In college I'm in this small language class of 7, and they recently organized an exchange trip to go to the country of the language we're learning and stay with a random family there. I'd go to my exchange partner's school and everything, then the exchange partner would come back to stay with my family. I'm obviously really anxious about this, as I don't think I'll be able to cope living with complete strangers due to my social anxiety, as well as attending a foreign school (I'm also not very confident speaking the language anyway). 

But here's the thing - they need 6 people to go on the trip, if not, then they can't go ahead with it. 5 people from the class are definitely going, (the other person not going has an actual financial reason) so it's basically up to me to decide if they get a trip or not. The teacher is really trying to push me to go, so I'm feeling really pressured. If I don't go, the whole thing is cancelled.

Please help!! I really don't think I can cope with going on the trip, but I also don't want to ruin my classmates' only chance of a trip before we leave college. Why does it have to be up to me...