Sleep Habits... in Step-Momming Adventure

If you have read my first entry, you know that my fiance and I don’t live together yet due to spacial restrictions. So this means I see him only once to three times a week usually. So there are obviously time when I am not there overnight when L is there. W and his Ex-Wife have a 2-2-5 breakdown for custody. Mon. and Tues. are ExW, Wed. and Thurs. are W. Then they alternate Fri, Sat, and Sun.
So at L’s moms (BM) current home they share a bed all the time as there is only one bed in the room they share (She stays w/ friends.). So that is a consistent habit. When L is at home with W the rule is he can sleep in W’s bed only on non school nights. Okay fine. But with the current Covid-19 situation there is no school so L has been in W’s bed EVERY NIGHT that I am not over. So when I am over he has to sleep in his own bed, and sometimes it is a struggle.
There was one night he was complaining he couldn’t sleep in W’s bed as I was staying over. So I sassily commented “Oh do you just want me to go home then and not stay the night?” His usually response is “NO!” as he truly does like spending time with me. But that night he just said “Yes.” and I have never been so hurt by him. I didn’t expect it to stab like that, but it did. Needless to say I was so close to going home, but I was not going to let him have this little fit and win. So I stayed and moved on with the evening.
I just think he is being effected mentally by sleeping with W and BM so often. He shows some lack of maturity emotionally in certain areas, and has a hard time controlling his emotions because he always has one of them to lean on when he has a problem. I am not a therapist or trained in psychology. This is just my brain breaking down what it sees and trying to make sense of it and make connections through it.
I am a little scared what is going to happen when W and I are able to live together full-time and L isn’t allowed to sleep with W anymore. Obviously if he is sick, had a nightmare, actually needs him I won’t say no. But this habit cannot be healthy for his growth mentally and emotionally. I’m just not ready for that…