It hurt SO bad when he put it in

My boyfriend and I tried to have sex (both for the first time) and when he only slightly put it in, IT HURT SO BAD

Like so so bad, I knew it was going to hurt some what (because it was my first time) but I didn’t think that much

It hurt so bad I had to tell him to stop :(

I feel bad for him because I feel like I ruined his first time?

What’s wrong with my body? Is it supposed to hurt like this?