what i like to play around with is dm, am, em, g/b, fm7.
Yup, playing guitar does relax and sooth a troubled mind. I have turned to my guitar for comfort a few times in the past couple years, but never for breaking up with a girl. I only turn to people/things for comfort when something happens that strikes my emotions like a glass bottle against the face. You know what I mean, stuff like when friends of yours die for various assorted reasons. (suicide is the worst :() Another sound I have been playing with lately is like:
e-3-3-3-3-
b-3-3-3-3-
g-2-0-0-0-
d-2-2-0-2-
a---2-2-3-
e---0-3-0-
along with a few other chords that I can never remember their names (who would name something am7sus4/g#m anyways?)

The point of this lesson in therapy is that there is no emotional stress that you can experience that will not make you stronger and a better person provided that you don't break...and if you do succumb to the trial then you can always make more beautiful music than you did before.

Just a word of encouragement from a once broken man.