First time

Hello guys I need some help

So I'm 18 and I had sex for the first time yesterday.

I've got some questions:

1) Is it bad if you or partner don't cum and what does it mean

2) Do you have to bleed on your first time.

3) what does it mean when he says ( your vagina was loose)

4) He was really tired after it but I didn't feel anything

5) how did you guys feel after) cause I feel depressed and disappointment right now

6) He also acted pretty different with me after sex