crying

I know that there a many triggers that "make" me cry, having to do with leaving the attention and compassion of my therapist, now that I have ended the therapy, eight months ago. But I can't seem to keep all those thoughts about her, from triggering tears and a lump in my throat. This often happens at very inconvenient times - singing in the church choir, watching t.v., etc. Are tears always good "to get out", or should I try to stop the thought that brings them?