My girlfriend met another guy during our fight—can I ever trust her?

In our first week together i found out she is with other two guys, and later on she said sorry and i wasn't serious about you... and after two months we had a fight of 4 days almost break up fight, she met a guy for lunch and later on she said i thought it is over between us,

beside that she told me in her past she dated 6 guys at once and she dated all her brother's friends

now she is saying that she is committed to me and loves and wants us to be together... should i trust her or am i the next victim?

My girlfriend met another guy during our fight—can I ever trust her?
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