<human>: Give me the gist of the text in a nutshell

I've been in my current city for about two years; I'll be 20 next month. I have a small circle of close friends, most of them coworkers. I'm very happy with this group of people, but of course work schedules are tough to work around and I usually don't have anyone to hang out with during my free time. 

However, I've found it difficult to make friends outside of work, for several reasons:

1) I'm a full-time student during the school year and I often make new friends in classes. However, once we stop having a class together, we lose touch or they become too busy to talk. Therefore, it's hard to make friends during the summer at all or maintain friendships during the year. I go to a competitive private university, so friendships are often placed on the backburner in favor of career goals (although my entire career centers around meeting and helping people, so I suppose I thrive off socialization).

2) I've tried a few apps like MeetMe to expand my radius, but I've mostly been met with serious sexual harassment on any of those apps. I've downloaded them multiple times, only to delete them in frustration after the 100th dick pic. This would be fine if I were single, but I'm seeing someone right now.

3) I'm somewhat introverted and struggle with mental illness, so I prefer to stay in. This also makes it hard to meet new people (although I guess it's a bit self-sabotaging). 

Any suggestions? Making friends as an adult is hard.
<bot>: I want to meet new people! But I struggle to for a number of reasons. What helps me get out there?