Help please I'm so weird

I'm in year 11 (I'm in Australia so at college)and there are some girls from my sociology class I get along with and I catch the bus with one. Lately my other friends have been pushing me out of the group and I want to hang out with other people but I don't know what to do. Please help last time I was friendless I became suicidal and depressed. I don't want to become suicidal again