How do I get out of this deep hole of depression?

My Whole Life Has Been Nothing But Pain.... I’ve had so many good things happen don’t get me wrong but some how the good never last . Some days I’m so sad i don’t wanna live anymore some days I’m so tired i just wanna sleep some days i don’t wanna eat I’m so young and going through so much i keep everything bottled in and it’s killing me i feel like if i express myself nobody will really listen they’ll say there here for me but nobody really is sometimes i wish i had another life I’m so tired of living it’s crazy but then i look at my kids and i say i can’t and won’t leave them alone but sometimes im not as strong for them as i should this depression has put me in a deeeeeepppp hole and I’m afraid i won’t be able to come back from it.