What do I do, I am so anti- social and I chose to study abroad?

[Prince Cataan]

oh dear. this is a tough one. i don't want to get you into any weird situations, but have you tried networking with something like craigslist or a personal ad? it might seem creepy but if you just explain yourself, your interests (leave out the sexy bits) and where you want to go maybe a nice low maintenance travel companion or two will find themselves to you. Maybe even post a flyer in a coffee shop. Maybe there are others out there who feel the same way as you and wouldn't mind connecting.

and you are going to school there right?

strike up a conversation with people in your classes.

try facebook, list all your classes and find out who else is in them... post a bulletin about going to munich.

check out hostels maybe?
travelers often find themselves there.

As far as fitting in with the group, you probably aren't compatible with those people, maybe you can find some "your type of person" out there (e.g. non bar going traveling types), it takes some work and many failed attempts at friendship but you have to be persistent and believe that they're out there. I hope this helps, good luck finding some cool people.