Oh that's depression.
I have that all the time. The happy and sad songs that make you cry,places, things..
One of the things that makes me cry is just knowing that my parents are getting old. There's nothing wrong with either of them, but I see their gray hairs and loosening skin, and just start bawling.
I totally get this, and it sucks, but can I ask you this? Do you feel like there is an underlying message for all of these random things that make you cry? For instance seeing my parents, a sunset, even a cat waking across the street, reminded me of time and how little we have on this earth...And how I felt I was spending it poorly. What is your underlying message for things that make you cry? Perhaps if you find that message and address it you might feel better.