Hi, there ~ I know it sucks ass (and not in the nice way) to be stuck in a work and social situation that leaves you lonely. Here are my hopefully practical suggestions for how to get out there and meet people to add to the ones already posted by other folks in this thread. Sorry if some are dupes; others were answering while I was composing this behemoth!
1) Full-time college might not be for you right now, but you might not always feel that way. Consider taking a class with transferable credits at a local community college. Or if possible, take a class for credit at the same college your friends are going to (I say "if possible" because some schools require you be accepted into a degree program to take any for-credit classes, even part time).
But even if you can't take a for-credit class (or if you don't have the time or inclination for intense schoolwork), you could take a class in their continuing education department – if not something practical and career-related, how about photography, creative writing, a foreign language, figure drawing, etc.? – something fun in which you'll find people with a common interest in a specific topic. I don't know Seattle very well, but for UW for example, it looks like the Continuing Ed campus (https://www.pce.uw.edu/about/locations
) is much closer to you than the main campus (although some classes are either online or at the main campus). But the best part of taking a continuing ed class is that you get full access to many of the same student benefits as full-time students! So again using UW as an example, even just as a continuing ed student, you'd get access to the dining halls, libraries, campus events, museums, and the IMA (which looks to be an athletic center with workout equipment and pool), student discounts to sporting events and shopping, access to parking, etc. (full list: https://www.pce.uw.edu/help/resources-po…
). This would make it so much easier to hang with your friends, plus meet new people! (UW's continuing ed main page: https://www.pce.uw.edu
2) Spiritually-inclined? If you're down with God, join a church of your denomination, or if you don't have one, perhaps you'd find a home in a super-liberal and totally-okay-with-LGBT-people-and-their-practices Quaker meeting. Not so down with God? Look for a Unitarian-Universalist church, or if meditation interests you, my personal recommendation: a Buddhist meditation center (full disclosure of bias: I'm a Buddhist!). The organization I have participated in for 25 years is Shambhala International, which is based on traditional Tibetan Buddhism, but Westernized and fairly secularized. Here is the Seattle center's main page: http://seattle.shambhala.org
, and they also hold meditation programs nearer to you: http://seattle.shambhala.org/west-seattl…
3) Meetup (http://www.meetup.com)!
Meetup is where you can find 1001 social get togethers based on nearly every demographic, activity, profession, or interest you can imagine. Bonus: Many are geared to young singles. You should have no trouble finding ones that do not require 21+.
4) Volunteer! There may be some volunteer-oriented Meetups (above), or just identify an organization that speaks to you. Some ideas include: animal rescue organizations, soup kitchens/homeless shelters, trail cleanup, even occasional office work for an orgsvhf
Sorry to be so wordy, but I wanted to give you as much info as I could, because I know what it's like to be in your situation! The best of luck to you!