I never get invited anywhere. I remember my "friends" in high school telling me that they would call or text me with the location of the party, but of course, those calls never came. When I would ask them, they would say "sorry man, next time". Since I wasn't really one of them, they didn't want me around outside of school. I cut all of these people out of my life after the third time it happened. I would have been fine if they told me I couldn't go, instead of them bullshitting me, giving me false hope.
In college, well my college is small and there is an anti-alcohol policy, so there are no parties. I commute for one, I don't dorm. Also, a big portion of the college, are HS graduates from a particular town, so they already know one another and are set in their social circles. I am in my third year, and I pretty much go to my classes, and leave.
The few people that I do talk to, are like me, in the sense where they have no life. I remember two times, my friend (his social life is like mine) could have gotten me into cool parties when his older brothers felt generous enough to invite him. Well, at the last minute, he would give some excuse as to why he couldn't go, and if he didn't go, I didn't go because he was my "in" so to speak. It took me a while, before I realized that he was never invited to these "parties" , and that he was lying, so I would think he was cool. One upside to having no social life is that my grades are damn near perfect though.