Bad sex tanking my relationship???

My boyfriend and I have been dating for 3 months and I suppose or assumed that for the reason of trying to take it slow, we never had sex. Plus he had this “the first time should be special” notion. Nevertheless, we were always super turned on by each other, can’t get our hands of each other etc.

We went out of town with a bunch of his friends 2 weeks ago and finally had sex, and there was no chemistry. It was just really blah, and dead, and all that fire we had somehow was missing. Ever since then, our relationship has been rocky and bad. We have spoken about the bad sex but no clue how to fix it. He suggested a sex getaway- lock ourselves in the room and get freaky all night but I doubt that would work. And my disagreement has him thinking this relationship means more to him.

I do like him and want to fix this. Any suggestions and thoughts?