love behind bars

I ask this question because I am in love with someone who is behind bars. We’ve been together for a year and going on 5 month. I’ve met him through our high school year and he is an amazing guy with such great personality. Lately we’ve been arguing non stop and he has his doubts about being unfaithful to him and I have thoughts that he’s been unfaithful to me even before he went in. I love him so much. I just don’t know what to do.