Boyfriend has been on tinder during our relationship?

Just found out my boyfriend has downloaded tinder during times in our relationships. He said he gets it every time we have a fight and I'm not with him and he feels insecure, and it's a bad habit. He hasn't messaged any girls on it before but he had the intention to (just gets scared/feels bad). He's had and deleted it like 7 times. He lied to me about it when I first confronted him, but I kept questioning him and reasking my questions until he broke down and told the truth. He apologized and accepted the blame. I really love him and don't want to break up, but I don't know what to do. I'm in shock because he didn't seem like the type of guy to do that. I know he has depression and mental health problems, and he's starting to see a therapist this week. Should I really believe our relationship will get better?
Boyfriend has been on tinder during our relationship?
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