right time for first time?

hello! I have been casually seeing this guy for over 7 months now, and we both said that we didn’t want to get into a serious relationship. we’ve done pretty much everything but have sex and I feel like i am ready, but a little voice in the back of my head it’s really scared because it’s my first time. i trust him, I feel like I am ready, I want to, but i’m nervous... is that normal? he’s not my boyfriend, but I know he’s not gonna leave me right after we have sex (if we do)...