4 years is a long time. I think you should try to make friends more than trying for partners. You may have a specific interest,  make interest social and you will get many friends along. Let me explain this with an example. If you like reading books, join a library and visit the library daily. There will be people who come to the library daily. Make friends with them by talking to them daily or suggesting good books. Once you have good friends to fall back to then try looking for a low maintenance partner who is average and well mannered.  Don’t try to go for popular people or people who are extroverts for the start. So at least you will slowly start to develop some long lasting relationships. Try this and let me know how it goes.

Regards Peace