Fwb wants to be exclusive

Well this one guy who I was talking to for a while (4yrs) we eventually met in person had sex then after I got back home bc we live between 2 to 4 hours away from each other we continued to talk and have playtime from time to time for the last 3 years well a week ago he was asking me if I wanted to be more then fwb and wanting to take the next step in our relationship couldn't see each much due to certain situations well I agreed and told him my plans for next year well between the last 3 years we both have been entertaining other people he ended up getting someone pregnant who later miscarried and me Ive been dealing with my kids dad we both know about it but now it's like I don't know what he wants anymore bc we haven't talked in almost two weeks this isn't new we've been doing this on and off communication but we always came back to each other so I'm hoping we can continue to make things work between us if not I'll be hurt by this 💔