Need some perspective and advice

This guy I have been dating for about 10 months now has changed his demeanor, how he treats me, and doesn't act quite the same. Started by saying really sweet things, bought me flowers, took me out. He comes and stays with me almost every day. However, he doesn't tell me how he feels. He doesn't take me out or plan anything with me. He doesn't ask me what I want, need, or anything. The text messages throughout the day are becoming less and less, with no true conversation. He doesn't talk about a future with me. I found out through his ex that he cheated on her, which he lied to me about at first. His ex still has pics of them up on her social media account after being broke up for over a year and a half. He silences his notifications. When I asked to see his phone, he replied that id get upset over old pics. When I try to have a real conversation that is meaningful, he distracts me with being comical as if what I have to say is a joke or unimportant. I get the feeling that he just doesn't care. I also feel as though I was a place holder for a time when he just needed someone to fill a void. It's really causing me stress, anxiety, sadness, fear and doubt. It's hard because I care about him very much and want to make him happy. I love him very much, but I can't be in another relationship where I feel alone. At the same time, he does come with me to my children's events and activities, helps me with household things when he is here, goes to church with me sometimes, goes to family holidays with me. Any advice would be appreciated.