My Girlfriend Breaks Up with Me and I Am Devastated

My girlfriend breaks up with me and I am devastated. I can't seem to stop crying. It may be that I watch sad movies and listen to sad songs on the radio. I seem to find myself in a depressed state from which I cannot escape. I feel like a loser and I think I will never be in a relationship that lasts. The type of therapist I should see should adhere to which approach?

A) cognitive-behavioral
B) psychodynamic
C) humanistic
D) existential