Buddy System

My boyfriend asked me to marry him but I have a lot of issues. One of them is that I dont trust his friends, the male ones. I think if he were to cheat on me, they will more than likely lend a hand to allow it and help cover it up. Never get critiques of a potential guy from his male friends and never depend on his male friends for truth. Its always bros before hoes. I dont know why men are that why. Was it their father that taught them this? It makes it very hard to be a woman when their needs always come first. I love my boyfriend to death and it may sound weird but I may actually pass on the marriage offer. I am too scared and I cant overlook his negative qualities.