i have calmed down quite a bit since yesterday. but this question still remains. how can i know that i should stop chasing? am i fooling myself when i think she's actually worth chasing, even after causing such a nasty breakup? can i know that she'll behave nicely or poorly in the future, based on what i've experienced (because I've experienced both good and bad sides of her).

is it just wishful thinking to think that the mean side she showed me was just a result of stress and fear (she tends to wig out under stress), or is that really a part of who she is and if hypothetically we do get married, will that come to bite me in the butt 15 years down the road?

how do i just "let it die?" when things just felt so right when she was here?