I need mommy advice PLS!

Sidney • Kai Landon Hanes stole my heart 💙
My son is 4 months old & the only way he falls asleep is on my breast. I need to change this because I go to school 4 days a week and my mother and boyfriend are having trouble putting him to sleep when I'm not here. ( I also would like to just put him to sleep without using my breast too ) should I let him cry it out? How do I wean him off my breast in order to fall asleep? PLEASE any tips help at this point.