Should I tell him how I feel?

My ex-boyfriend and I broke up about a year ago after a 2 year relationship. After we broke up I started seeing another guy and then lied to him about it and he caught me in my lie and told me he would never be able to forgive me. Since then we have gotten over our differences and become friends but lately we have been seeing each other a lot more than normal and he has even been staying the night at my house almost every night for the past couple weeks. Since we have been spending all this time together I am starting to have feelings for him again and he makes me feel like he feels the same way although we haven’t talked about it. I want to talk to him about it but I really like the way things are going and I don’t want to say anything that would scare him or jeopardize our current friendship. That being said I also don’t want to keep going the way we are if he feels like it would never be anything more because of how I hurt him in the past. So what do I do? Should I say something or just see how it goes?