Should I let my man go on a guys trip?

Ok so my boyfriend and I have been together for 8 years. Have been going back and forth about marriage and him proposing to me for awhile now. (He’s the type that takes forever to do shit). But he has just told me he 100% wants to marry me and he is positive and that he’s going to step up and do it. He just wants to make sure his life isn’t over and he will not be ok lockdown. Mind u he has never gone on a guys trip in the past 8 years when his friends go and always stays with me. Now his friends are single. But they are going to Virginia Beach for 4 nights (5hours away) and he brought it up to me. He said if I don’t want him to go he won’t and he doesn’t care to go that it was up to me. But did bring up that this is a test to see how I would be apart from him before we get engaged/married. He said he would only go for a night or 2 because he didn’t wanna be a way from me or our son for 4 nights. Soooo should I just let him go? I just want to make sure he knows it’s not going to be like his life is over if we get married. Would you let your man go in my situation? Does it sound like he’s serious about marriage? Just looking for advice!! Thanks 😊