<human>: I posted here yesterday but my question was a bit all over the place, and I wasn't really sure what kind of advice I wanted.

I'm a 21F, in a relationship with a 21M of 2.5 years.  Neither of us have friends.  However, I'll leave boyfriend out of this.  This has more to do with me.

I find that I don't have a lot in common with the other college students around me.  Basically, there isn't any reason for them to want to hang out with me.  If they want to go somewhere, they aren't going to call me up, they have better friends.  I feel I'm not particularly interesting or memorable and I don't know how to go about improving myself.  I could invite them places, but I don't know any people well enough to do so.  I have invited people out before in the past, but most of the time it either leads to a one-off activity (rarely) or them canceling or having to reschedule.  So in short, if I'm not spending time with my boyfriend, I'm sitting alone in my room.  I have some extroverted tendencies so this really bothers me.  College is nearly over and I'm so lonely.  

Is there anything I can do to make friends?  I've joined clubs that relate to my interests, I volunteer, and I have a part-time job.  I'm just looking to see how to make myself more interesting.  I either talk too much or I don't talk enough, because I'm so nervous, and that's probably alienating people.

Summarize the given text in a few sentences.
<bot>: I want to make friends but I feel I'm not interesting enough.  How do I develop myself and make me into someone people would want to befriend?