Cheating husband

Last night I went into my husbands facebook and discovered he's been cheating with his ex and 3 other girls one them he's cheating on me before with, I hoped in my car and went looking for him and when I found him I lost it! He's doesn't even really seem sorry he keep saying he cheating because I made him feel unwanted and I'm telling him you started changing and I reacted to that, he blames me for him cheating! We've been together for five years and I've forgiven him for this for the last time, I hate him and I love him. My eyes are swollen from crying and it's hurt so bad I don't think I'll make, but more than anything my pissed the fuck off and ready to fucking kill him and his dirty ass ex girlfriend(who had sex with his brother btw). I'm going crazy right now and don't know what to do, I wanna slit his fucking throat right now I'm so fucking angry.......