Being manipulated often makes you look and feel crazy, as does dealing with arseholes. Sounds like you may have been coping with both.

Therapy is a good idea but have you also considered trying out some hobbies that regularly put you around other people in a low pressure environment? The goal isn’t to “make friends”. Just pick one or two activities you’re curious to try and turn up regularly. After a while they’ll recognise you and be low key friendly, but more than that it’ll be a bit of a break in your day where you’re absorbed in something pleasant.

Note - you’re not trying to be besties or find a man. You’re pursuing interests with the pleasant side effect of cultivating hobby acquaintances. Don’t give out your number. Don’t be upset if you don’t hang out with these people outside of the activity, this is fine. Don’t be discouraged if it takes a while to see benefits. If it’s boring or people are behaving in catty/creepy ways, don’t be afraid to bounce to a new one.

Ps. I don’t recommend bars. There can tend to be a lot of unnecessary drama and while there are decent folk there are also lot of idiots and people who are just on the prowl.