I was gonna say that you should let her know your emotions and know how much you care about her and then just wait for her to embrace you or reject you, but I guess that already happened. However, it's much better to know one way or the other, than dwelling on it for ever. Either, both of you will change and get back together or at least you will change and get the right girl eventually. I wouldn't try to get back with her though, let her come to you and if she doesn't, or if she does, but she is the same then say no thanks.
Well, the main topic at the beginning was the whole staying hard thing and climaxing thing, so I'm gonna try to help with that because I'm sure you will meet another girl sometime. When you are making out or having sex with a girl and she is on top you can reach her feet. Just lightly caress her feet with your fingertips or lightly scratch them depending on how much she can take. It might not tickle her because she is in the moment, or she might like it. It may turn her on more. If she asks you afterwards about it, just say, "I like your feet." That sounds better than, "I like all feet cause I have a foot fetish."