I do have friends and, know so much people... but why do I feel so alone ?

Perhaps it is because you were made for fellowship with more than just humans.

You are still in the middle of the misery and pain of a break up.

https://www.askmehelpdesk.com/relationships/why-does-second-heartbreak-hurt-most-840664.html#post3821278

Who dumped who?

its just so tiring to cry every night. Just breaking down in random times makes me feel so weak. I'd smile the pain away , but , I'm falling apart. I really don't know what to do anymore... I'm near to giving up everything and just end my life..

We all go through such emotional stress when love and romance fails, some more than others but it would help if you relate the story behind the pain. Start with your ages please.

I'm near to giving up everything and just end my life..

Whatever happens, don't do that. Things will look different two months from now. We go through dark times in life. I've been there. I've had days (hundreds of them) where I would wake up and ask myself, "Are you going to get up and go to work or lay here and die?" In my case, I never stopped believing that God had an answer for me, and He did. That was 40 years ago, and I'm still up and going.