Time to go solo! Then you can get out, spread the love and have no guilt about it. As long as people do it safely what's the issue with having fun.
Sure, a relationship is nice but only when she is the only one you have eyes for, and those girls are rare. So, get single and enjoy life doing what/who you want until you come across a girl that makes you go bat **** over her... But those are rare. I've passed up some really nice girls with good futures (had a 2 year relationship with a doctor to be) just because I had noticed I wasn't in to it. The one that changed me was nothing more than "average" but she had whatever it was... And those are the girls that you want to stay single for, so when they show you you can start a fresh relationship without any BS.
So just take the leap, do what's right and be single. Let her get out there and find someone that respects her.
I had to do that a few months ago. The girl was crazy for me, and I could get her to do anything, but I just didn't feel that way for her so I had to man up and break it off more so out of respectfor her and not waste her time.