i am no relationship expert but i do know quite alot from a few friends past mistakes.
me thinks that if she didn't like what was going on in the relationship she should have told you or gotten out before a heartbrake happened cheating is distastefull. pick them right if you or anyone's future lady/guy cant be faithful and trust eachother they have no reason being together, i'd cut my tongue off before i think about cheating.
on to the original post
from time to time i talk to my lady ask her how her day went and yada yada yada,idk about some but imo they lighten the mood a bit, but they do relax your mind. go and drift off into your own fantasy land. ohh and um im here to talk if you need help -.- know it didnt make sense just my two cents