You are not alone. I also feel like this. A couple of months ago, I had an emotional breakdown. For hours I would start to cry during random times always about life and feeling not love and useless. I had a hard time during those months but my mom was there to talk to me and help me get things out and feel "better". I did overcome my breakdown but it is still very hard for me. I have very few friends so I dont have anywhere else to go for comfort. I am always alone at school. the stress at school is adding more weight for me. Sometimes i feel I cant go on any longer and fall into some kind of minor depression. I have no more fun or happiness and if you find me laughing or smiling, it is my mask. I made a motto for my self and it helps me kind of. Maybe it can help you too but maybe it wont. I always tell myself this motto that I made. I like being alone cause it prevents me from feeling more pain and sadness.

"Don't show emotions"
No one will hurt you
"Don't talk to others"
No one will gain your trust
"Don't trust in others"
No one will disappoint you
"Focus on school"
It distracts you from your problems.
"Being alone will prevent me from getting hurt by others"

Even though I choose to be alone, I still have that ONE SPECIAL BEST FRIEND that always there for me during good and bad times even though we live far from each other, we keep in contact after i moved out of state. ( I used to live in Arkansas in 2011-2012 and moved away to Texas, half way through 2012) Its been 2 years since we last saw each other face to face but we promised that when we are able we will reunite again and celebrate our friendship.

I feel like that most of the time... I thought about it and they always say "suicide is a permanent solution for a temporary problem" something like that... But I feel like saying how about you live my life and let's see you don't feel the same thing... When I'm with my friends I can put up a fake smile and they won't even notice... Sometimes I wonder if they even understand who I really am... But by the end of the day, life goes on... I think you should live your life for yourself... If others don't appreciate you now, other people will later. We still have quite a lot of time to think about our significance to this world. I hope you don't feel alone. You can always talk to me if you want...