tired

I'm getting tired of feeling like I have to beg my husband for sex it's super annoying about an hour ago I was laying next to him and rubbing him and what not and he just like brushed me off and turned around. I asked so what your just going to go to bed like that then he said well then give me a blow job. Like really then I don't get anything. How lame. So then he said whatever then. I don't get it. when we were dating he had a high sex drive now it's like he never wants it and the times we do is bcs I approche him. He's just so dull I'm getting pretty bored. I'm not saying I will cheat but damn what's really going on. I don't know makes me feel insecure and makes me wonder if he's just not into me anymore or if he might be cheating. I really don't want to think that way and I feel bad for even doubting him but i can't really comprehend the reason why. my mind just wonders and It could be just me assuming stuff but I can't control my mind and I just end up thinking the worse. Anyone else going threw something similar? I also want to mention that I discoverd he had a flicker account and was looking at nudes on there which is why I feel so doubtful about him. I never imagined he would. I thought he was a decent man like he claims to be and is happy and satisfied. I'm just confused. We had a big fight over the pictures and stuff and I just don't know if he still looking at stuff. I just don't know why but I feel like there might be a reason for his behavior. Any input? Thank you