Question!!! Relationship advice.

So I’m in a military relationship and we’ve been dating for 3 months, he’s gone right now and I hung out w another guy that’s a friend and finally got to meet him! We just talked at the casino. We didn’t go anywhere or do much. Was it wrong to hangout with my friend if I’m dating someone else? or I’m good? And just overthinking this... I realized that when meeting my friend, we don’t really have a connection and I don’t wanna see him ever again lol. Age difference is too much.