Have you had any counselling over the years?
It seems that your past hurts are really affecting you and have prevented you from forming grown up adult relationships.
You also seem to view sex as something transactional - something women give a man in return for care/love/commitment.
But it’s not the only way sex between people can be viewed. For many people sex is a joint and mutually enjoyable act. And it’s not always tied to commitment. And certainly not something that is exchanged for commitment.
So - I am not sure what you mean by saying you were used for sex when you were younger.
Did you not consent? Did you not enjoy it?
Or was it the case that after sex you expected the men to commit to you and take care of you?
I think you are right. You are in a vicious circle of self fulfilling prophesy. And men sense it and aren’t willing to try to heal you from years of hurt other men inflicted on you.
I think it’ll be the same if a woman tried to date a man with low low opinion of women. They’d run. Same way the men do with with you.
It has nothing to do with you having had sex with them.
There is a difference between expecting the person you started sleeping with to dedicate efforts to the relationship and DEMANDING they do by not sleeping with other people.
No one wants to be faced with demands so early on in the relationship. Even if they weren’t a player and didn’t plan to pursue others.
So - as far as the relationship go - it’s not unreasonable to expect and hope for something, but it is unreasonable to express it in the way you do.
Plenty of people in your age group manage to meet each other, date, and form relationships without early ultimatums. And it doesn’t mean that they sleep around ok each other in the early stages.
Just mean that they are more comfortable with taking a leap of faith that relationships require.
It’s hard for you to believe that because of your history. And I don’t think you can change it, unless you do some healing.