How do I cope and rebuild my self-worth after being cheated on?

I don't wanna tell the whole story but I got cheated on. It has become a normal thing now but for me it is still something that only happens in movies. I am all shattered. My whole belief system has fallen to ground. I don't know what to do about it. How to cope with it. How to get better. How to not think shitty about myself. How to live with this fact of getting cheated on. We've been together for more than 4 years and I did so much for our relationship and this is what I get in end?

I just want help... please help me. I don't have any good friend who i can talk to. I'm sitting alone with this deep pain and grief. What should I do.

How do I cope and rebuild my self-worth after being cheated on?
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