Is it really bad to want to move back home because I’m lonely?

I’m about to graduate from university and I’m going to move back home with my parents because I get too lonely on my own. My university is 500km away from my parents house. In the four years I’ve been here, I’ve made no friends, I’ve been seriously depressed and have made one half-hearted suicide attempt. I know I should get out there and grow up. I mean, I’m not shy and I’m friendly and talkative, but I’ve only met one person that I could even imagine myself being friends with. I can’t stand how shallow and promiscuous people are, and their total lack of self-respect. I mean, I’m going to get a job and everything. Am I a complete loser?