Jksdf

Maybe he's not comfortable, he's scared, a million other things could be going on.

Best bet: talk to him. =)

I would need more information. Such as, have you ever had sex with him, how long have you known each other, what are his views on sex and relationships, etc. Human sexuality is a complex thing and there are many factors involved--let me know

He might be in affair with some one else

Just proceed your way and don't worry of sleeping with your boy friend for sex.sex can happen with someone also but your future will never be a thing to share with someone else.

How old are both of you, how long have you been dating. What is his views on sex outside of marriage, For too many issues without more information