Is It Stupid To Think This?

I was born with an illness and my family had to take care of me until i was old enough to do things for myself. Through the years of hospitalizations and growing up faster than i should have i gained a lot of perception and saw the stress in my family's eyes and words about having to focus so much on me rather than themselves. I feel really bad and don't think I can ever repay them, but now i'm 22 and my dad, mom, and brother are all still alive and well but they've all kicked me out of living with each of them individually either for not having time for me or growing weary of having to help me when required. i've always been single and only 2 girls have ever liked me that i know of. one was just some stupid 2nd grade thing and the other i didn't even know about until it was too late. i've always felt like this void in my life. Is it dumb to think i need a girlfriend to make me happy? i just never really felt like anyone WANTED to be there for me when i'm going through hardships but felt like they had to be. My supporting evidence is my family not being close with me now that i'm 22 and old enough to take care of me. I just want someone to WANT to be around. i'm hardly ever sick anymore, but still have to take care of myself in ways you don't know about and am just sick of being alone or feeling like its an inconvenience when someone is with me. I think this way because i've had girls that are friends and i'm content with that, but when they aren't single anymore they're gone with the wind