you and i are living our lives at the expense of others. i'm assuming (and i hope) you have a shelter to live under, you can eat when you need to and use your electronics and luxuries as you please. as we do this, there are other people starving, murdered and dying from disease every day. it's not our fault at all, it's just the order of life. it's how it always has been and always will be. we can't ever change that there is a balance of people who can live their lives with ease every day and people who suffer every day.
there are people who are aware of those facts and move past it, people who are unaware of them and live their lives and then there's you and me. we realise that life is not so great and we can't accept it. some of us get more than our fair share of challenges in life and some of us are just tired.
what i'm trying to say is, life is for the people who are strong (physically, mentally and emotionally) and/or ignorant. we can see this in animals too. obviously, the strong dominate, the strong survive. unfortunately i am emotionally weak so i turn to suicide. of course suicide is not just for weak people. some people have a logical reason to commit suicide, but a lot of us are emotionally weak or have given up because we've been knocked down too many times.
so you may be thinking, "oh no, i'm weak. might as well commit suicide." as humans, we are strange compared to our animal counterparts. we don't allow the weak to die, we help them. so in that case, the only way life is worth living is if you have somebody who is strong at your side to help you along. maybe it is a partner, a friend, or family. the sole purpose of life for a person is people, in my opinion. if you don't have anyone you love and who loves you in your life, if you're all alone, then yes, i think life is a waste.
but i have my family who loves me and i love them, so why aren't i happy? that's the part where it all falls apart. i hate myself. like i said, the sole purpose of life for a person is people, but with that you need to love yourself. i never thought it was true, but until i got in a relationship i realised that you need to love yourself before you love others. only you can learn to love yourself. and some people can never seem to learn that, so they can't achieve any functioning and happy relationships with others, which like i said is the purpose of living, so that's what leads to suicide.
if you can find the effort to learn to accept yourself (if you can learn that), and if you have hope that you will be able to find one or more people who can make you happy and help you in your bad times, life is definitely worth living.