<human>: Basically, my girlfriend is one of the best people I know. She's very selfless, sweet, smart, and attractive. I honestly believe that she'd do anything for me. We've been dating for just over year and a half and were friends for two years before that.

Despite being a great girlfriend, she can be overbearing at times. If I'm out and she doesn't hear from me for a while, she'll panic and assume something bad has happened. In addition, many areas of our relationship, including the sex, have gotten stale. It's simply not as fun as it used to be. I still really care about her though and I honestly don't know if I'll be able to find someone who will be as caring and generous as she is.

I'm always honest with her and I told her that things have gotten stale. She says she knows that she isn't as fun as she used to be, but she's going to try.

Part of me just really wants to be single again. I've become quite attracted to other women. I can't tell if I'm really unhappy in my relationship or if my interest in sleeping with other women has clouded my judgement.

I'm legitimately concerned that no one I find will be as understanding, kind, and smart as she is. At the same time, I've grown bored of her. This tends to happen in my relationships. I commit for a while, get bored, and break up with the girl.

If I had the choice, I'd be completely in love with my girlfriend and have no interest in anyone else. Is there any way I can improve my relationship or is it simply too much to ask?

Any advice would be greatly appreciated.

Can you condense the text into three sentences or less?
<bot>: My girlfriend is awesome, but I've gotten bored with her. I can't seem to find a relationship where this doesn't happen. WHAT'S WRONG WITH ME?!