How to get over being used for sex?

it has ruined my life knowing everyday that the guy I'm in love with uses me for sex.

he's so manipulative and when I say he can't come round, he won't take no for an answer.

Everyone thinks its my fault for being a doormat, but no one understands how controlling and manipulative he is when he wants something.

Plus, we do get on and have a laugh together and a lot to talk about, and therefore in the moment I feel he doesn't just see me as a sex object. But I know he does and it hurts. It makes me so depressed and has had a very serious impact on my mental health. I have very low self esteem and I just want to cry all the time. I feel ill never ever be good enough for anyone to invest in.
How to get over being used for sex?
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