Creating boundaries(rant kinda long)

Okay so i don't wanna sound crazy but how do i create boundaries when my boyfriend takes forever to text back for example when he takes a shower ik for a fact its at least 2 hours plus he always wakes up in the afternoon anyway so today he woke up at 1:40 took a shower and came back at 3:40 then he disappeared and came back like nothing was wrong when he sleeps he sleeps for the entire day he says he bored which i understand cuz i be bored too but i just figured instead of sleeping all the time he would want to talk to me i feel like im crazy and pushover because he does this constantly and i always let it happen and don't stand up for myself i just don't know how to because he doesn't see anything wrong with it and before the quarantine like way before when he would come see me we would talk about it a day before and he would come at 6 pm and he would always say his sister had him to doing mad errands and my mom constantly tells him that i shouldn't be the last priority and don't decide to spend time with her after you finish everything and i understand because sometimes i don't feel like a priority i feel like i have to make an appointment with him however i also see his side i don't want him to choose between me and his family i would never ask him to do that i just feel like i deserve more time with him but also i understand his side and maybe that's why i excuse it idk im just confused and conflicted

*This was just a rant so sorry if there is not proper grammar or i don't make sense i just wanted to get it off my chest