Some Advice Needed asap

Okay.. this is kinda scaring me. Lately, I've been very distant, I have not been reaching out to my friends, and I haven't even been up to hanging out with anyone. I just want to be alone. THIS IS NOT ME AT ALL!!! I love going out and having a good time, but lately, its like I don't have the energy, and I just dont want too.

I've suffered from depression for 2 years (keeping it to myself, no one really knows), and this is the first time I've not been myself and have become so distant.

Any advice.. could really use some