You know what? I almost decided to skip this thread because I don't always like to read long posts even if they are just a little bit long but, something made me reconsider and after reading your post you sound like a lot of what you have been through and your experiences are very much like my own.
Don't feel bad about never having had a boyfriend, going on a date or intimidated by hansome men.
That isn't important right now.
Also when researching other illnesses and conditions it is important not to decide that just because you have some similar symptoms that you must have that condition but, when you get ready to have a diagnosis do bring it up just in case.
If you have researched something and it sounds spot on to the point that it is practically undeniable then do save the documents and list of symptoms for future reference.
Also you're still very young. Don't be in a hurry to start dating men or you may end up going out with men who turn out to be a disappointment. Work more on your confidence for now, continue to do research of psychology (it's fascinating!) and do some research on relationships and how men think and behave.
Also do get a diagnoses so that you can start therapy and when you feel good enough inside and confident and strong then, is when you start looking for a good man.
Don't be overly picky but, don't go out with just anyone either. Make sure that it is someone who seems to be what you're looking for.
Good luck to you.