Where even are my feelings?!

I used to get feelings so easily, as in scary-easy. Now, I actually don't know where my feelings have went. I cant even properly explain it, I'm sleeping with a guy who I really shouldn't be sleeping with - nothing. I'm using him for sex. The past 5 guys I have slept with I have just had no feelings for when usually I'd be all up in my world of feelings. It's the same with work - I get stressed out or something might happen, but I dont feel anything about the situation. I find it so hard to actually think positive things about me, but I find it hard to actually like or dislike myself. It's very confusing! I'm not sure why I'm sharing it, certainly not for sympathy or whatnot, I just dont know where my feelings have went 😂😂