I want to go through some of the points you’ve made.
I’ve been drinking, smoking, crying, I haven’t eaten in 2 days.
As much as drinking, smoking and not eating feels like an escape, it will just make it harder for you. Be conscious of how much you’re drinking and don’t let alcohol become a crutch. I know it feels better to be anaethetised, but in the long run, it won’t help and it might harm if you drunk text or make decisions while you’re not sober. So be kind to yourself. Stay healthy.
I feel like my entire world has crumbled.
Not your whole world. Your marriage. And that’s awful and it hurts and yes, you feel betrayed. You have been betrayed. Let yourself grieve. That’s what you’re going through now. The grieving process. This is why a therapist will really help. You can and will survive this. He is a part of your world, not the whole. You are worth more than just your marriage.
I don’t know what I did wrong. I tried so hard. I feel like such a failure. I put in so much work, life, and love into that relationship. I feel so betrayed and stupid.
You quite possibly did nothing wrong. You are not a failure. Yes, he’s betrayed you, but you aren’t stupid. This may not even be about you. He says he just wants to use this person for sex. So, it’s not because she’s better than you. It’s about him and his needs. He sounds quite narcissistic.
So many good guys I turned down before and with him. Is this a phase for him??? Is he going to marry her, have kids with her and grow old with her ??? How can love exist after this when I believed it’s true love? He said he can’t even bring her around his family/brothers/parents because she’s so young :( I asked him if they were dating and he said no he just wants sex from her ??? But he has her picture on his phone???
Right now, you’re focused on her and him and the whys? What he does? What he wants? Where he goes from now on? These things are not something you can control and aren’t something you should concern yourself with. Easier said than done. Try not to FB stalk him. Try not to focus on what he’s doing. Focus on you and healing you.
I want to fucking die.
No, you don’t. He’s not worth your life. He isn’t your life. He’s a part of your life. You have a future. Do you work? Do you have a career? Do you have children? Do you want children? You have so much life left to live. And it will be a good life and one day, one of those nice guys you passed up will come knocking and you’ll pick up the pieces.
Turn your phone off for now. In time you will have things you need to discuss with him. For now, reach out to your friends. Do you have supportive friends and family? Call them. Let them help you. You don’t owe him anything right now. You do owe yourself the time to grieve and heal. You really are going to get through this.