Welcome to Gaia! ::

I have similar problems (thought not exactly the same)
I tend to think I'm 'damaged goods' as they say. That I'm wired different and just aren't able to make relationships(with family, friends, ect.).
However I've found that this doesn't bother me much..alll the time.
I have one friend my best friend, my sister (if not by blood by every other apect) and for me that is more than enough.
I've figured that when bonds are meant to happen they happen, it's not something that can be forced upon anyone and if it's someone who has a hard time doing so this is doubly true. (also when it comes to friends it's quaility not quantity that matters)
If making more friends is truly important to you then just realax and let it happen, while the thoughts won't go away the less time you entertain them the less they float around (they'r like those fish that know humans will feed them, if they see they're gatting attention they'll float to the surface)
You don't want friends you can't be yourself around TRUST ME (take it from a preacher kid who's not exactly anyone's idea of a perfect catholic..or person sweatdrop ) Once you find the right person, things like that don't matter. ( Despite my theories that I may not be meant for friendsI have a best friend who despite all the headaches I cause her (most non intentionally) has yet to walk away from me and I am incredibly grateful for that)
And yes a bisexuals can be frriends with catholics ( i'm catholics and I wouldn't care about that, I'd befriend anyone orientaion regardless, 3nodding I won't lie and say everyone else is like me but I'm not the only one who thinks so either )
i don't know enough about Autism but I supposed it would be harder to make friends the more severe it is (as I understand it, some cases are more acute than other) however it's not impossible. That I know, anyone can find a friend someone who accepts and understands.-even if they're not looking. It takes more time sometime (I had to wait 13 years for my first friendship..but..ne I'm kinda weird. most people don't have to wait as long.) but it's worth it.
I 'm kinda new at the whole aspie/autistic thing and that is why this is my first post-but making friends...or not making them is something I do know about. So I couldn't help but put my 2 cents in.
I hope this helps.

I think Alice couldn't have used better words. But I would like to add that confidence comes with years to acquire. Its like what they say. You have to love yourself before anyone else can love you. Then once you get that down maybe you should try approaching people yourself. Be a little observant with your peers. Try to eavesdrop in a conversation and if they seem to be talking about a topic you're familiar with try putting in your two cents or even open up a conversation with a joke. Making the mood lighthearted can really make friends pretty fast.