have you thought about asking your family what it is that they dont like about your bf? It might help if you sit down with them and tell that you love them lots and also love your bf alot and you would like to know why they dont approve of him as he has done no wrong by you (if this is the case). When you talk to your family, try not to get defensive, stay calm and listen to what they say, keep breathing (and dont get emotional eg. cry or get angry as it wont help).

You might be able to clear some things up in their minds and if it doenst work then your in no worser situation than what you were in before.