Am I overreacting?

For about 3 years my husband would message other woman on snapchat looking for attention. He was extremely immature and selfish (his words). Snapchat was the biggest way he would message girls. Since then he’s grown, put himself in therapy, and is so hard on himself for putting me through that. I do see a change in him.

He gave up snapchat for lent and recently got it back. I told him how it kinda bothers me that he has snapchat. He told me that he doesn’t have any girls on there other than family or friends we both know. After mentioning to him my concerns, he tells me “I can delete my snap chat if it makes you feel better” I then told him “no it’s okay” because i don’t want him to feel like i’m dictating his every move. He leaves his phone with me, showers without it and forgets sometimes where he left his phone. He also doesn’t care if I have his phone and will give it to me if I need to feel reassured. With that being said, am I overreacting for feeling a little bummed that he downloaded snapchat again?