I've felt this way alot lately. At the least, I hope you know there are others going through this, and it's not something peculiar about you. I'm glad we can find a bit of encouragement and prayers here. God bless you, and just make it through each day for now. Definitely keep any temptations locked away until you are feeling better (gun, pills, etc).
Below is a meditation that I keep nearby to remind myself that everything isn't wrong or off-track just because life sucks, and that I'm not a failure just because I feel worthless and nobody likes me. Maybe you won't agree with it, but it's something to think about, and IMO there are several Bible verses that correlate:
"Life is not about happiness. Life is about becoming a better person through suffering, sacrifice, self-discipline, and service to a greater good. Fulfillment, inner peace, wisdom, and patience are not things to obtain directly, but byproducts of seeking something higher. Accepting suffering and bearing it each day can lead to happiness, but when we make happiness our goal we usually will not find it."