My best friend had a baby and I realized that she and I are way more different than i thought?

[gummi90]

Ok my best friend had a baby from a dog who cheated on her before during and after the pregnancy and when she found out about it five months ago he did nothing to change it oh and he has been living with the woman since november before the baby was born(baby born in december premature). But she still professes how much she loves him and wants to make things work however he is playing them both because she still sleeps with him knowing he goes home to her every night and I can't help thinking she is dumb. I really think we need a break from one another because every time she talks about him she irritates me how do i tell her i think he isnt worth it or am i wrong