So, I lost my virgnity to my boyfriend, but have yet to try anything else with him. He goes down on me and fingers me, but I can never seem to return the favor. I worry that I'll do it wrong or something. And he's had another girl give him a bj before. He tells me that he's fine, and that I don't have to unless I want to. I just freak out. Any advice to get past the nerves and what to do??