I'd say take philosphy. It is great. I barely passed highschool english with a D- but I got an A in community college intro to philosophy class.
Second, where do you live? I'll be your friend if you are close by? Are you happy with your physical appearance other than blushing? That sounds cute. You just have never had affection, so that is why the shame creeps in.
Take care. I know there is a disease where poeple always look like they are blushing, but that is different. You are probably just that way. It is natural and not something you can help. Maybe ask a doctor. And counseling wouldn't be bad.
Just don't think of it as gross or shameful. I bet it is really cute, but people have yet to appreciate it.
P.S. - I am straight edge and never go out except to work full time and college. The only getting out I do is errands and stuff. I know what it is like to be a loner kinda.