Is there something wrong with me?

So I haven’t had sex with my boyfriend in over 2 months. When we’re in his car he gets hard but when we’re about to his erection goes down and that kills the mood. I also been naked on top of him I even gave him a blowjob and nothing!!!! We are planning to have a baby but how if we’re not even active, idk if it’s because he’s a little overweight which to me is no problem at all but idk what to do. He is not a kinky person he is very close minded on some things and he gets upset when I use my toys. What am I suppose to do I’m starting to feel like there’s something wrong with me if I’m not able to turn him on. This has never happened to me before.