My nephew is high functioning autistic. I see that he has social difficulty. He was on seraquile for a few days once and he attached a woman who was just walking down the street while on that med. My mom took him off of it imeadatly. They are lucky that the woman was not seriously hurt and that she was understanding of the situation.
As far as your jealousy goes I think it is important that you think before you speak or act upon these feelings.
I know some people do act flirtatious even when they are with their s/o and they think it is harmless. If your boyfriend doing this and it causes you pain you might want to question why you are with that person. On the other hand if you are simply jumping to conclusions because someone looks in his direction or even straight at him and they aren't rubbing all over him or nothing like that you might want to give the benefit of the doubt.