I'm a lesbian, Will my relationship with this straight girl work out?

Sorry, I believe she's experimenting and I think she is straight. I had a friend like you, she got dumped after a year of 'dating' a straight girl, that girl had her fun and returned to men. If you are ok with a short term fling, then go for it just don't put too much heart into that. You sound like a great gal and even though your question seems long, you are clear about the situation and this showed that you are still rational. Just know what you are doing, don't get burned. Can't turn a straight girl gay pal, always go for a gay girl, there are loads out there. ;)