And don't even say beat out the younger, hotter, richer, more available girlfriend...(unless you have a how with that)...;)
Million dollar question isn't it?
If you can't beat them, join them. Let go, allow them to live their life, open the cage and let the bird fly free. Deal with the emotions of having to let go and then prepare to move on with your life. Spend time with friends & family, start dating again just to see what the rest of the world is really like and maybe just maybe learn to love someone else. Impossible to comprehend at this point but maybe something you will consider in due time.
I don't know what to do now.
Seriously in my own situation, after the dynamic changes and things start to move in your direction, things plateau a bit, push/pull starts to re-appear, similar issues start to surface again and although the intentions are there to do the right thing, intentions aren't good enough, maybe my expectations are high (but the trick is how do you keep them low) and I'm seriously getting tired of this process and I'm asking myself daily why I'm doing any of this and I can't say my feelings are wrong, they are what they are. Maybe we've changed so much that we start to figure our own value in the equation and the other party doesn't look as good anymore, maybe we don't match up anymore, my perception of things is changing.
I have no preconceived notions about any of this, I know it requires work. There is nothing wrong with admitting that this is work and that there will be problems, the problem is thinking there is no problems and it won't require work, that isn't realistic.
But... after a while the batteries need to be recharged the existing charging station isn't doing as good a job as we used to think.