Me [M22] and my Fiancé [M21] had a conversation and now it’s making me anxious.

About a month and a half ago my fiance who I have been with for 10 months now (I know it’s fast) but we don’t plan on being married until I finish school in 2 years had a conversation and he asked me if I felt like I was ever missing something by being with him. I told him no and I asked him the same thing and he told me emotionally he could never have someone better then he said but physically he wonders sometimes. I told him that it’s ok to “window shop” but if anything else had happened I’d be upset. Now he is at a music festival with friends but comes back home every night and last night I talked to him because I felt really anxious the whole day about it not because I felt like I couldn’t trust him but because I feared the what if. He is at the festival with friends whom I have met some and trust them but I don’t want to go through them if anything happens. But when we talked last night he basically only told me that he couldn’t do anything to help ease my anxiety besides telling me he wouldn’t do anything but I felt that was sufficient enough to ease it as today at work I thought about it all day and am now. Because of how I feel now I want to talk to him again tonight when he gets home but I am scared I’m going to come off as paranoid. I’m asking if there is another way I should go about this or not and how would other people go about this if it was happening to them as well. Any advice for this would be greatly appreciated and thank you all.

TLDR:Anxious about a comment my fiance made and is now at a festival and the potential of what could happen worries me.

Context: I have dated before and been cheated on 2 times and he has never dated before him and I got together.