Husband broke my heart 😐

Okay, so I work during the day until 5 Monday-Friday. My husband works overnight. We spend the weekend together and maybe a week day if I switch days. we have dinner together every night with our kids.. We are very tight and have such a close bond. Very playful & we talk bout a lot. We have great sex. Often. We have two kids. The only “stress” going on in our lives is unfortunately work/bills. So long story short, last week I noticed he downloaded a dating app called plenty of fish. He made a profile and then deleted it. ASAP. he didn’t even get to the point where he talked to anybody BUT it still broke my heart that he even made the account in the first place. Now I’m no saint to begin with but since we got married two years ago almost, I never had thoughts to get another man in any way. & I’m no fool.. I know them apps are just for hook ups. he claims he felt so bad and deleted ASAP bc he felt so out of place and doesn’t know what he was thinking. He wants to prove to me he wants to be with only me. Now bc he NEVER did anything before to me, I forgave him bc I want to give us a chance. but my thing is, once i feel played, I cut ppl off easily. I am a very distant person when I feel played in any way, big or small. I’m TRYING to give him the benefit of the doubt bc he’s my husband. So don’t judge me nor talk shit. I’m here for advice from of you ladies who can relate bc at this point I don’t have nobody to talk to about this. Has anybody ever forgave somebody & it was extremely hard to let go of the issue? Deep down inside I feel he does want to be with me, I just keep filling my head with what if’s. I don’t think I was ready to forgive but I did bc I WANT to. I want to learn how to forgive. But just this ONE TIME! My mind is getting the best of me. I’m thinking way too much. Any advice on how to forgive the correct way?