My boyfriend (18M), who I've been with for 2 years, spent 7 hours at his ex-girlfriend's (18F) house on airplane mode on New Year's, completely ignoring me (18F).

My boyfriend, 18, and I, 18, have been struggling with trust issues. He cheated on me before, which I’ve tried to move past, understanding that we’re still young. With Christmas approaching, I was looking forward to spending the day with him, but he ended up ignoring me, which just created more tension between us. On New Year’s, he chose to hang out with a friend (which I’m fine with), but then he suddenly went on airplane mode. When he finally turned it back on, I discovered he was at his ex's house because he forgot to disable his location. He refused to come home, wouldn’t answer my calls, told me it was over, and went into airplane mode for seven hours. The next morning, he called me at 7 AM and asked if we were still together. I was in tears, asking him what happened, but he insisted nothing had occurred. Now, I’m left wondering if I can trust him or not. I don't look anything like his ex, and I’ve shared with him how insecure that makes me feel. He questioned why I let one person affect me this way, but he’s often praised her beauty in the past. I’m not sharing all the details yet because I’m still very shaken and upset about everything—I really need advice on how to confront him, communicate my feelings, and whether my insecurities are justified.