Do you think this guy is gay hes never mentioned having a girlfriend?

[Helen]

No he's not gay. He simply kept her a secret because he's a self-centred, attention-seeking twit. Not so shy after all, it would seem. This guy is a class A "player". I'm sorry you've been made a fool of, but you need to look at it from a different light. You've had a lucky escape here, and at least you know the truth now.
How would you feel if you were his girlfriend? To know that he'd been getting close to another girl; spending all his time with her, leading her on? Allowing his university friends to tease him about it; allowing not only them, but another innocent girl to assume that he is single?
It's unfair on you, and it's most certainly unfair on her.
Think about it from another perspective.
IGNORE this loser from now on. You're worth more.