AIO: My boyfriend [26 M] was caught adding women on Snapchat and lied about it to me [27 F]

I was having a weird women’s intuition moment last night, and I was bugging out feeling like something had happened where he’d breached my trust. For context he used to always go to the clubs with his buddies who always cheat on their girlfriends. He insists he isn’t like that and always leaves when they start partnering up with girls. Until last night I always trusted him. I asked to see his Snapchat, and saw three convos (messages no longer visible) from varying times about 9-10 months ago. In the moment he claimed they were just spam added by mistake and I even felt so bad that I apologized, but I couldn’t shake the feeling this morning and kept prying.