Quoting Honey Boo Boo:" I agree, i am planning on talking to him when he gets off work in a little bit but my only issue now ... [snip!] ... perfectly fine with him and i lately and he never complains about me and is super attached to me and loves on me...than this.."
That is called the "honeymoon" stage, darlin. lol.
Time to move on from all that. This tends to stop when the man already has "courted" you and all that.
What yall both need to do is trust each other, not sweat the small stuff, and communicate.
By the sounds of it, there is more to this story than just asking him out the blue what his dad wanted/needed. Sit down and talk to him if you feel like this is a make it or break it quarrel. If you are determined he is "hiding something" or cheating, ask him about it in a private, adult manor. If he say's he is not. Take his word for it, get some couples counseling, or leave him.
You either need to learn to trust him and let some smurf go, or you will eventually push him further off and not trust him for the rest of a miserable relationship. ((No trust in a relationship doesnt turn out well in most cases))