While it's good to ask questions, don't interrogate him. Take the pressure off yourself. It's possible that he won't respond to you. Gaining confidence will take time; don't expect it to happen overnight. Not really. Bisexual men are men who like both men and women. If you aren't sure, just tell him that you need to think about it.
Rated this article:
You don't have to ask every guy you talk to for his number. Be friendly. How do I know for sure?
Meeting gay guys is hard.