I told one of my recent SBs that I'm combing the area for an NSA FBuddy with zero financial demands on me--other than some drinks and appetizers.
It reversed the downward trajectory in her performance.
Posted By: principium
The Rat has articulated some of the favorite methods which women use to break up, but since you have stated that you are no "mean" person, perhaps you have the proclivity for letting things drag on more than you really need for them to!
My advice would be that from the beginning to hold their feet to that often and overstated "NSA" terminology which most, if not all, POT SBs seem to be very fond of using! For that reason, I would like to exercise my NSA card at anytime when I wish to, just like they would in a NY second on you, when I am no longer feeling it with the said SB particularly when I don't "owe" her anything having meticulously abided by the terms of our agreement.
Interestingly in my case, I have been avoiding my own most recent SB (used to be referred to as the Uni) for a variety of reasons but mostly because I had not been too happy with her in the last couple of months, so much so that now she's texting me after 2-3 days of not hearing from me (it was very usual that we would text a few times a day in the past, mostly initiated by me). In her last text message she even brought up the question of finances and as to whether I was still OK with the original arrangement or whether I was considering a "change". Since I had felt that was a leading and loaded Q, I deflected and told her that all such matters must be discussed in person (texting BS is just that, i.e, BS!). The funny thing is that I know with 99.999% certainty that she sees other SD(s) and I am the one who no longer has anyone else on his roster because I had decided to stay on the sidelines till at least end of Jan or early Feb.
My final advice would be to stick to your defined principles and if you have in all earnest manner paid her and have committed to your end of the bargain, there is no reason as to why you can not just say that you longer feel the attraction or the desire to carry on (again that darn NSA). Good luck OP.