Long time lurker, unfortunately, first time poster here.

So, I'm (29M) about to get married to an incredibly wonderful woman. However, for some reason I just see no point any more. I care about her, but my long time (I'm talking like at least half my life) depression coupled with the state of the world, my crippling debt, inability to get a meaningful career in my field (I have a bachelor's degree in physics and am working at a theme park as a custodian) make me think I'll never have the life I want and I should just end it all now. Although, I don't think I have the balls to actually follow through with something that I perceive as a selfish action.

I'm just overwhelmed with it all, and don't know how I can continue...