You can’t be so desperate that you have to play the supporting cast in someone's “Psycho-drama” just to avoid being alone.
If you aren’t happy in the relationship, and there’s no way to solve the differences, do both of you a favor and end it.
Then volunteer your spare time. You will meet ladies with similar interests.
Reminds me of something I heard a comic say once: "I've been single for a year or so. It's driving me nuts. All may friends say 'Hey, do what you're good at...what you love and you'll meet plenty of women.' So I've been sitting around the last couple months, getting stoned and watching reruns of Star Trek and guess what? No one's knockin' the door down..."