I feel really bad for this kid in my high school?

This kid in my school is pretty much a nerd, with no friends, he's quiet, he's weird looking, and just awkward. I feel so bad for the kid, I talk to him sometimes so he's feels like he has some friends. I met him on the first day in Freshmen year, I didn't know anyone and I needed an English partner and I offered to partner with him. I remember he very quietly said okay, and after a few minutes I thought this kid is a loser. We just started Junior year and he hasn't changed since Freshmen year. His main problem is shyness, he doesn't talk to anybody, not even the teachers. When he does talk, he mumbles awkwardly.....he talks to me because I'm friendly to him but he's still shy to me too. Despite his weird appearance, I think his shyness makes him an outcast. I was in a group with him and this girl one time, she was really pretty. She tried talking to him, and tried to be friends but whenever she asked something.....he would say "What!?!" or something like that rudely...because he doesn't know how to be social with others. When the girl walked away for a moment, I told him “Dude, don’t be so rude, she’s a girl”, his response was “I wasn’t rude, I just said what…”, I told him she was only trying to be friends with you and didn’t talk to her…….she could have liked him, you never know…….and I told him that.......I was trying to tell him that he should be nice to girls, even if you don't like them. In total mean this kid has no social skills at all…..and he’s too nervous to even attempt to improve them alone. It’s Junior year now and I would really like to help him. We have the same lunch this year…….I can’t imagine how lunch was in the previous years for him……but I want to go over to his table and talk with him. I want to see if he might like any girls, or think they’re cute…..I know he won’t say he likes anyone but I can suggest girls…..I would love to break the ice for him and help him become more social. BUT I don’t want to be a pest and I KNOW he likes to be left alone……but if I don’t try then he will have no good high school memories to look back on. What do you think, do you think it would be good of me to help him a bit? BTW it’s not like I’m mister popular at school but I’m outgoing, I didn’t know anyone when I first went there…..but I continue to be friendly and make new friends everyday.