Sex isn't good anymore :(

So I have been having problems with sex with my husband, I love him and I want to enjoy sex with him but I just can't get off, he is basically barely entering me and just rubbing the insides of my lips raw, he use to give me eye rolling toe curling sex but I don't know what happened, I don't know if he got bigger and Jr got smaller, or if he just isn't into it anymore like he makes out to be or what it is, I have tried to talk him about it before and it just either gets awkward and we change the subject or he starts feeling insecure and starts making jokes, I have tried to tell him how I like it and tried to do different positions but nothing, he usually gets off and he works so hard and thinks he's really doing something and he is sweating and tired when we (he) gets done I don't want to make him feel bad or whatever after he is done, I was almost in tears earlier Bc didn't get off and all I have is a sore vajaja, I don't know what to do, I tried to avoid sex with him for a little bit so those feelings wouldn't be there but he began to think I was cheating on him so I just started letting him continue with sex please any advice this is VERY embarrassing for me