Guys, How do I convice him that it's gonna be ok?

A guy friend of mine has been going trough some real downs with girls lately. The kind where they manipulate him into thinking they have feelings for him, only to reveal they seem him as almost like an object. Now, he's convinced women aren't as nice as he tought, are evil and that he should have never engaged with them in the first place. He has depressive tendencies so I'm like afraid of what he'll do if he doesn't sort this of. I tried to reassure him that he'll eventually find someone that isn't like this but he doesn't wanna listen to me.

Guys, How do I convice him that it's gonna be ok?
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