Partner says no to oral he used to enjoy ??

So before my boyfriend was obsessed with going down on me and he used to beg me to let him go down on me more often. Now it all changed , it's been like this for over 7 months that we don't even have sex anymore. I literally have to ask him can we have fun .. because anytime I try to touch him he rejects me so I'm just too scared to touch him. I ask him to go down on me , which I never had to before. And his excuse is "I'm too tired " not tonight.. but yet still goes ahead and has sex with me ?

I really don't understand it. How can he be tired to give me oral but not tired to be on top of me riding me.

Does this sound odd to anyone?

It's actually making me so selfconcious. That I'm really debating now whether he even thinks I'm hot. Like we never have random sex anymore. Anytime we do have sex . The build up to it is so weird. He lyes on his back first and has his eyes closed and after about 10 mins he goes into kiss me and just strokes my back. But never goes and does anything else.

It's making me feel like there's something wrong... what would your opinions be on this?

He says I need to stop asking for it cause it's annoying. But I tried explaining that every time we have sex now it always comes from me. I always make the first move. He never wants me anymore. And he is like I do .. But he's not realy showing it...

I'm lost , any time this happens we just end up arguing and sleeping in separate rooms cause he is too tired and wants to go to sleep and I'm left there in bits crying because he's made me feel so insecure and shitty.