My fiance told me he loves another girl.. he cheated on me with her.. how could I handle this?

We were in 7 year relationship.. i loved him so much.. i always think what is wrong with me to make him cheat and loves another woman.. i feel like i am not enough i feel like nobody will love me anymore

My fiance told me he loves another girl.. he cheated on me with her.. how could I handle this?
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