Why? Opinion?

On and off with this guy for three years. Never made things official until two months ago. But I don’t know. I’ve felt like something’s been off. I was stupid. Went through his phone. Found out he wanted to break up with me a month ago. My thing is. You made me a key to your place. You cleaned a drawer out so I can leave clothes at your place. we say we love each other. If he is really that unhappy. Why do all this? We have no kids. No ties. Trust me. This guy can get any girl. I never thought I’d be in his league. But I was. And now I’m hooked. I’m just confused. How can he look at me. Kiss me. Cuddle me. Hug me. Tell me he loves me. Care for me. Help me through my problems. Have my back. But tell others something else?