How do you get over a broken heart?

Long story short: my boyfriend cheated. I always suspected something with the new girl , he gaslight me, making me question my own sanity. Couldn't sleep properly for almost two month's. I saw my relationship breaking and couldn't do anything. I still can't except it. I'm feeling like my whole world crushed in these two months. What should I do?

How do you get over a broken heart?
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