Feeling depressed not sure why

So its 10:18 pm...

My SO and his sister and i are watching youtube as usual but out of 3 people in the room only 1 is feeling down...

And that person is me 😓 im not sure why im feeling this way but it always happens at 10 pm...

Usually i wonder if there's something missing or something is bothering me may be something not making me happy.

Any suggestions i can do to stop this situation?

Or

At least have someone to talk to?

Please help im even dropping tears for no reason...