advice please

I would like a guys reason but everyone can join in.

So I have a guy I have been talking to for 10 plus years off and on. I have done everything for this guy. Like give both monetary things and emotinal support. Basically he always knew where he could come crawling back and there I am with arms wide open.

We couldnt ever make us an offical relationship cause neither of us have been single at the same time.

Soo what really bothers me. I know it may not sound serious but we were friends on fb and he randomly unfriened me. We weren't fighting and I never started shit either (I have seen him in and out of realationships with other people) . So why go thru all the trouble to unfriend me?

Are we still friends?

I did ask him. I explain kinda what I just said. Basically ask did I do something wrong are we good?

He never really answered and said he was making another fb. He already has another I know about both. But he has never friened me again. I know this sounds stupid and yes I care more than him.