Should I invite my ex best friend?!

If you feel like he's coming back into your life then I don't see why not, unless you think he would cause drama by being there.

This would also depend on the reasons why you two didn't speak for 5 years. This is a deeply personal question. Do you feel very close now? Do you just casually talk? If you only chit-chat here and there, probably not. Its really up to you to decide.

I'm only asking because we were really close and fell out and now we are trying to mend it he is in the Air Force and moving to Japan if his orders go through so that's another thing I live in Ohio and he lives in South Carolina

If you're re-establishing the relationship, then it depends on how much mending has been done and what caused the fall out in the first place. But don't let your conscience guilt you into inviting someone.

If he's currently in your life now, then yes, I would say extend the invite. I had this happen as well. An ex best friend and I reconnected after she got hired at my work, after 10 years of not speaking. I invited her and her family because we had reconnected and got close again. It all depends on if he just came back in or if you're actively communicating again on a regular basis re-establishing your friendship.

He opened the communication like a few weeks back and we have talked a lot in just a few weeks he genuinely seems to have buried the past and I have a long time ago. I think we are on the verge of being close again obviously not like before but an active part of one another's lives. I just don't want to be bold after just a few weeks and say oh ps come to my wedding haha

You can still be friends with someone without being close enough to invite them to your wedding. 5 years is a LONG time, and people will change in that amount of time. Has your FH even met him? There were plenty of people I was close with in college, who I have only seen once a year since we graduated 5 years ago, and I did not invite them to our wedding. It doesn't mean I don't like them, it just means we aren't close anymore.

So.May.Run.On.Sentences.

How large is your wedding? If you have 10 guests, I'd say no. But if you have 300, I'd say there is probably some space to squeeze him in and it would be a way to show him that you really do want him to be a part of your life.