Yours is a question I occasionally ask myself from time to time. I'll be 100% honest and say my life has mostly sucked for as long as I could remember, and generally my best efforts to fix things have been in vain. Now that I'm approaching middle age, it's pretty much a given that I'm not likely to ever have even the relatively modest things I might have wanted out of my life. When I look back, I see that most of my failures weren't due to personal failures on my part, but failures on the part of others. In the end you can only control you. Life generally is never fair. In fact, sad to say it seems like the people who put in the most effort, do the right things, generally fail to be rewarded commensurate to their efforts. Look at how our society is. The media rewards notoriety and wealth above depth of character. People are considered monumental failures by many unless they're earning six figures. Being nice or intelligent or even fun is meaningless unless you also fit society's mold of success.
Given all this, it's little surprise nearly every sane, intelligent, decent person goes through long periods of doubting their self-worth, questioning if they will ever fit in, perhaps even thinking life is no longer worth living. I've done all of these at times in my life, even attempted suicide back in college. By a stroke of luck I was unsuccessful. Afterwards, I lacked the courage to try again. In my case, the thoughts of leaving the planet forever weren't a spur of the moment thing. I had thought it through only after thinking how every path I had previously tried to improve things failed. It was simply a matter of being out of options, facing perhaps another 70 or 80 years of misery, and deciding that death was a better alternative. I remember the day well, going to school as usual, but not carrying books or any ID. The idea was to spare my family the pain. I had planned to throw myself in front of one of the midday expresses which came through Princeton Junction at 125 mph, figuring little identifiable would be left. My family might think I disappeared. I recall not really having any emotions prior to when the train came through.
What actually happened that fateful day was I saw the headlights in the distance, but the train for some reason was only going about 60 mph instead of 125 when it reached the station. Not fast enough to do the job I thought, I'll have to try again in about an hour when the next one came through. Well, 5 minutes later I became physically ill, thinking if not for fate I might now be scattered across the tracks. That was it. Once emotion entered the picture, going through with it was quite impossible. I've since thought of suicide, but never actively planned it out like I did that day. Really, ever since it's been little more than a passing thought which leaves my mind as quickly as it enters.
What happened that day? To this day it remains a mystery. Why the sudden onset of emotion? Why the illness? I thought afterwards perhaps I have a purpose, but maybe not the one I thought. And perhaps in time my life would turn around if only I could stick it out. To that end I did and do exercise regularly. This serves two purposes. It keeps me healthy which is essential on order to enjoy life. It also acts as an excellent antidepressant.
What it ultimately comes down to is, yes, life may be painful, even for decades. It may show no sign of getting better. But if it does, then you have to make sure you're still around or all the suffering beforehand was for nothing. Don't think that I don't constantly ponder how different my life might be now if perhaps a few little things had gone my way, or perhaps some people had been a little kinder to me. In the end though I realize none of that was ever under my control. Remember you can only control you. If someone chooses to accept or reject you then that is their choice. It's not necessarily due to a failing on your part. And more importantly, you have to live your life for you, not for others. I think that was what I really gained. I finished out the semester that year, took the following year off to do things I had always wanted but never had the time for ( including building my workshop which I use to this day ), and went back to school the following year ( my senior year ). It all seemed so different. I was more relaxed, more focused, and less worried about what might go wrong than previous years.
I think in the end that year off really helped me to discover myself. Before, I had been trying to be what everyone else wanted me to be. Sure, I still did well in school, but it was no longer the focus of my life. I also realized that perhaps being a career person like everyone expected just wasn't in the cards. My experience taught me the value of a balanced life. In a fitting bit of irony I think the entire nation is now on the cusp of rediscovering that. Life is still hard for me sometimes. I've been trying to hit on what exactly has been causing me excessive fatigue the last few years. I've had carpal tunnel syndrome which limits the amount of work I can do. Love is only a distant memory of someone special I haven't seen in 28 years. Still, I try to find a purpose for each day, and hope the next day will be better. In the end that's all any of us can really do. Believe me, many people have been where you are right now. Most find the will to go on, even under desperate circumstances.
Best of luck to you, and don't give up hope, ever.