I'm so goddamn lonely

[TigerLover]

You already know the right thing to do is to leave your girlfriend, you are basically stringing her along at this point. But if you can't do that you at least need to work up the courage to tell her what you're feeling. It's the least she deserves after she's been so open and understanding with you.

As for what you're feeling, it sounds like you might be what I am. A man who's technically bisexual but to all intents and purposes might as well be gay, only able to form lasting sexual relationships with men.

BUT The one and only way to be sure is to experiment and see if you're still drawn exclusively to men after the novelty has worn off.

You need to be brave bud, for you and your girlfriend's sake.