A lot of schools have “service fraternities”. These are nothing like the greek organizations that come to mind when you hear the word Fraternity. It’s not a group that has wild parties or anything like that. They are co-ed and do a lot of volunteer work in the community. They also host events, fundraisers, etc. This would be a non threatening way to meet more people. Think “Habitat for Humanity” type stuff where you’re actively engaged with others who are trying to help people in some way. If nothing else, you get to help people but my guess is the environment will lead to socializing. Good luck.