Confusing 😵

I've a very kind boyfriend. But i don't know why i lost trust towards him since he caught up with his old scandal dating together. We're on long distance relationship. We just meet each other once for couple of months. Since that, I'm confused with my own feeling. He apologise to me for so many time and treat me like a princess whenever we meet. I said to my heart just accept him back and forget about the past. But this couple of days i feels like he's cheating on me. I keep thinking about many things. My life is so miserable now. What should I do?? 😭😢