Period or Depression

Idk what's going on I dont feel right. I went to a concert last night (my happy place) I almost cried in the middle of it I went with my friend that once was my best but I don't know if we're that close anymore she makes me feel like shes better then me and I feel kinda used. I'm the third wheel friend and that's been getting to me lately. I've been feeling very alone like I have no one. This is very rambling my mind is currently going crazy and I've got tears running down my face for the 5th time today! I feel like it's all in my head and I'm trying to make it go away but nothing I'm doing is helping I have nobody to talk to. I just want this to stop