I met a lady on a business trip, and talked her into touring here, since then I have seen here on every trip she has made here, and she even checks with me before confirming her travel that her dates work with my schedule. She is now traveling her about once a month. I would like to continue seeing her, but would like to see her maybe every other trip, but I am not sure how to address this with out hurting her feelings.  

She knows my TER handle. So if I say I can't afford to see her, but post a review of another lady, she will get her feelings hurt that I lied to her if nothing else.

she asks if the timing for a trip works say no.

Open a second TER account to review other ladies.

....cause how many girls are coming to this area once month and check-in with a dude to set up a schedule....ya know, after they were convinced to tour the area? And if she doesn't read this board and you didn't give it away....  

you will see her next month if she comes back.  Then just establish the pattern that you want going forward.
I'm sure she is very happy to have a good regular customer, and will only be very lightly less happy if that regularity is reduced a bit.

Remember this is p4p. Something that you don't have to do. The ladies have to realize that you are giving up something (ie capital for investment) to be able to them.

You can tell her that exactly as you've said it. Hell, you could even link her to this thread. She's probably keeping you updated because that's what you've indicated that you wanted and what you responded to in the past. She may think of you as a regular and you haven't given her any indication that you don't want to be contacted. Just mention you're thinking of broadening your horizons/spreading your hobby funds a bit and you'd like to be contacted and to still see her but only every other month. That's reasonable and gives her the indication that your engagements will continue since you are so worried about hurting her feelings.  

...company immensely, you have limted time to hobby (hate that word), and would like to leave your options open.  I would also be honest, and tell her that seeing her once every other trip would be something you would truly look forward to.  

Some ladies can accept honest, and some cannot. I personally would rather someone be honest with me so I can plan accordingly.  I never feel hurt if a regular does not see me every visit.  (Perhaps a little disappointed if he is one of my ATF's, but never hurt).  And, I have even referred some of my ATFs to other ladies when I was not going to be in town often enough for them.  That's the nature of the business.

but if she thinks you have to answer to her needs and always see her when she's in town, she is in the wrong business.

She should have nothing to get upset over. You guys aren't dating. Just be honest. Say with her and other providers you see you cannot afford to see her every month.  She should  be smart enough to know to keep quiet unless she wants to lose a good customer.  

And well imo she shouldn't either. If you can't see her every single visit I mean just tell her how it is.

Jeez, did your parents ever teach you the word NO. I understand that this word has to be used with tact at times. However, there is nothing keeping you from saying THANKS BUT NOT THIS TRIP. I am sure she will see you when you decide to book every other trip. If not, I am sure that there will be an adequate replacement in the works.  

If you like her, and she continues to see you - and she even notifies you when she's available to see you, means you must be respectful and a good client. You pay the agreed rate, (unless she has given you a VIP rate for repeated visits, but it is still agreed.)

True, it's very easy to get caught up in someone and forget there are many many fish in the sea so to speak.   Sometimes things do need to be dialed back and there are many reasons on both sides of the equation.  For me, I know we're atms, but when I start getting treated like one it's time to remind myself that cutting back or moving on are options.    

There are nice ways and not nice ways to be honest.    Kind and honest are a good way to be treated and to treat someone, even those who may not be so kind or so honest with us.   There's something to be said for knowing you handle your own business like a pro.

clients actually do this.

long breakup letters - the it's not you, it's me bit pages long, a few a day until I block the damn email address lol.
The year or so later letter saying hi, (to my new email,) and all of a sudden I'm on an email chain with life updates to me and other girls (bcc'd) about retiring from the industry, and ... It's not us, it's him
The phone call from a regular to let me know, "I just wanted to let you know, I'm writing you a review. It is definitely inflated." Oh wait that guy wasn't trying to be nice lol. Scratch that.  
Let's just be friends - yes, the 'I think we make better friends than provider/John type' which was actually true lol. Those I've never minded when it was true
Take it slow concept, I.e. Appointments farther apart
I'm falling for you - I need to back off - yes, we all get those.  
It's not you, it's me... Random PM's when a guy posts about an ATF and it's not me, I get PM's saying 'when my thing is done with her, I'll definitely be back to see you!' I never asked, but ok no problem lol. Can't wait to see you lol.

Damn! after all that to deal with I gotta say y'all dont charge enough!

There isn't and shouldn't be a need to think of what to say. Just be honest and tell it like it is in a respectful manner. As long as your not handing what you have to say in a nasty deliverance she should understand and respect you as well.