After all, there are many passers-by in our life. Sometimes they can't last long, sometimes they seem to stay for a long time, but they can't stay forever. In fact, what I want to say is that if your friend suddenly sends you a message after a long time of no contact, I think you should reply out of courtesy. If it is true that your friend invited you to the wedding, what I want to say is that you are going, too. After you go, it's not too much to spend a couple hundred dollars with you. Even if he is married, it doesn't matter if he doesn't sleep. Maybe your news this time will rekindle the old friendship between you two. Anything can happen in this world, so don't do anything that you regret. In fact, what I want to say is that most friends should reply to this kind of thing.