I think I’m depressed

I think I’m depressed I have no motivation for life and all I do is cry all the time and I feel like I’m alone and I don’t like being alone I cling on to people so they don’t leave but they do and when I say how I feel I feel like a burden. I overthink and then hurt myself by doing that but I’m scared to go to the doctor as they say it isn’t that or that they’ll just say I’m overthink or my doing it for attention. Someone said if you post things about your “depression “ your just attention seeking and i don’t ever want someone to think it doing that cuz I cry cuz crying is the only way I can get my feelings out.