should i move on?

I know it may hurt you to see her with other guys, but love isn't a choice. If you love her, it will be harder to move on emotionally. If she's straight, it is unlikely she will change. I know it is nice to think that she will start to feel the same way as you, but you can't change someone's sexual orientation or make them have romantic feelings toward you.

I'm not sure. Part of me wants to tell you that it would be healthy for you to move on and find another girl. On the other hand, the girl I'm in love with says that she's straight (although I think/hope she isn't).

Well, I'm sure you know this, but there are plenty of other fish in the sea. There are definitley girls like you!