Life is hard. Sometimes when we don't have any intimate connections, we share things that are too intimate with people we've just met, and it turns them off.
You have to be careful, and try to think what other people are interested in and want to talk about, and maybe go for happier topics. You might have a heap of burdens you want to get off your chest, but sometimes just having a normal conversation with people helps.
Hobbiest clubs, meetups, and festival activities are places you can go to meet new people who also want to meet new people. If you can be friendly and positive, you can get a lot out of them. If you want to talk about the darkness in your heart, you really need to go to a support group or therapist that is meant for that, but you can't bring that on people who are trying to have fun.