Is it ROCD or simply trauma?

My partner and I have been together for nearly two years. About a year ago, he was caught lying about his communication with a woman from his past. They knew each other a long time ago, but there was nothing romantic or sexual between them. They ran into each other while he was at work, and he didn’t tell me about it. Instead, he lied about seeing her and even deleted their messages on Instagram. Since then, there have been other "understandable" lies regarding his issues with erectile dysfunction, and I discovered that his Instagram search was filled with pictures of other women—he initially didn’t admit that he was looking at them for that purpose. Now, I find myself constantly questioning whether this relationship is right for me. I analyze everything he does, even minor things like him getting off work 15 minutes later than usual. He works in construction, but his office is in the same building where this woman goes to the gym, which makes me anxious about the possibility of them running into each other again each day. I feel like I can’t find any peace of mind. Is this a case of Relationship Obsessive-Compulsive Disorder (ROCD) that can be resolved with him, or did he fundamentally mess things up, leading to my deteriorating mental health? I would appreciate any advice you could offer. Thank you in advance.