Confused 😔

Is it considered cheating when your man looks up specific girls you used to go to school with. It's not like he talks to them or anything I just feel like he's getting off on these other women's pictures and I just can't stand it. I feel like he just looks to look. A part of me feels guilty because the only way I know this is from snooping through his phone. Yes I respect my mans privacy but I'm is other half. If I can't go through his phone then we shouldn't be together. Anyways He's never once cheated in anyway but it's the porn and the pretty woman that fuck with me. I'm not skinny by any means but I'm not huge and my insecurities just get the best of me. I love this man with all my heart but I'm just over it and don't know how to explain this with out coming off as needy or insecure like I really am. either way I just needed to get this off my chest. thanks to whoever takes there time and actually reads this.