Casper, I'm going to attempt to explain this to your dumb ass one more fucking time, because you still do not get it:
1. Romances in the Mass Effect series are optional. You do not need to do them to complete the game.
2. It is impossible to "break" Shepard's character. You decide how Shepard acts as you play the game. It's kind of the main draw to the entire fucking series...
3. If you do not want Shepard involved in a gay romance, don't do whatever is required for that to trigger.
If you still can't figure out that you're bitching about something that is not going to affect your life or even your Mass Effect playthrough, do the world a favor and kindly go fuck yourself.