Do you trust someone that of a sudden had a change of Heart?

Basically not wanting to do anything with you anymore , being distant from you , being rude and disrespectful toward you and then all of a sudden they have a change of heart and start being sweet and kind and loving and positive toward you? Would that make you think they were up to something? Like why all of a sudden did they decide they want to be close to you again?
Do you trust someone that of a sudden had a change of Heart?
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