My mom is fine with my boyfriend and I having sex, but she forbids he goes in my room?

It doesn't really make sense but I think that it makes her feel like a better parent if she sets some rules. She's letting you have sex already! No parent does that! By setting rules like that it makes her feel like she is doing a better job at parenting. Just do it at his house or when she's not home. Be creative. Don't fight your mom over it, she's just trying to feel better about her parenting. Just enjoy the fact that you have access to birth control and a mom who doesn't get mad at you for having sex! haha hope this helps