I never thought you'd lose that light in your eyes

Today is a struggle. And what seems to be making it a slow crawl through treacle sort of day is the slow onset of suicidal thoughts. I just can't seem to shake them and the longer they sit there in my mind, sat there quietly but breathing heavily reminding me of it's presence the more I think of ways to do it.
I follow it through, what I would do, how I would leave things behind me. It'd be a train station, a smaller town one, fairly quiet, park the car with a note for whoever finds it. And then, wait until.... 
But would I take that step? I don't know but it is something that is playing over and over at the moment. 
I'm trying hard not to think about what I have in my life future wise as I'll just panic and worry over them. I won't seem them as opportunities, more obligations that I will screw up through my own passing which will add further stress and increase those thoughts.
This near constant brinkmanship is wearing and boring but I don't know how to stop it.
I've been in my bedroom all day, feeling empty, worn and tired, listening to MSP and PF. Thoughts of my ex-wife have brought me to near tears as I try and deal with the past and my missing her but I don't know how to. I think it's just this cold numbness inside that I'm finding hard to see past or shift that is making me crave her presence and a warm embrace from her. The urge to write to her an open letter on Facebook is once again very strong.
But what would I say? I guess how much I miss her and how much it hurts not seeing her now. 
What would it accomplish though? What do I want from it? 
Do I want her words, do I want her back in my life? What is the end result here? What do I want?
I ask myself this but I don't know the answer. 

I just... want her to hold me close...

This mess of a man.....