Answer:
I also have this problem, so i am glad to hear it is not just me. I too am over suspecting of my long term boyfriend. At first i started to suspect things and then i took it to going through his things to search for evidence. However when an illness overcame me, my boyfriend was there doing everything for me and i think it made me realise that he really wouldn't do that. As for you i think you should sit down with your spouse and talk about everything to do with your relationship and how much you love each other, when you're talking think of the things he is saying and think to yourself is he being genuine, depending on his answers it may convince you of his love for you and make you realise he would never do anything like that. I hope this helps :)