Is this depression?

I have been thinking about getting into having a therapist but I’m skeptical about going. But idk I feel like I have depression or something. I’m always so stuck in my head. I empty and at the same time I feel like I’m in a room with no doors or windows it’s empty and I’m screaming and no one hears me. And at the same time I can somehow see ppl i know just staring at me. I’m always so upset and feel alone. I feel like my life is useless. I have nothing going right for me. I cry way too much. I have so much bottled up. I just see no purpose tbh. No I dont mean suicide but really don’t see a purpose in me like why am I here. What am I here for? Only question I ask the lord yet no answer.