Just stop, take a breath, you are deciding with your emotions, and you are making everything worse. Just please do not do anything, leave him alone, by messaging him over and over and sending card, you will lose every chance you might have to be with him. You already told him you were sorry, if he loved you enough he would forgive you and talk to you, but he didn't.
You were surrounded but crazy people who made you feel paranoid and you acted crazy, but you don't have to continue acting emotionally. I know its very hard, I know you are thinking about losing something special and you did a big mistake, but trust me anything you do right now makes everything worst. He will tell you something really mean and leave you forever.
So if I were you I would delete his number, so I could not contact him anymore. He still has your number so if he wants you back he will call or text you. So just delete the number, Right notes on your wall, remind yourself that if he loves you he will call you, and if he doesn't maybe his friends were right and he did cheat on you in the first place.
Just leave him alone, so If he wants to go out with other people, he can go and try and understand what he lost. If he doesn't call this means he doesn't like you that much, remember not everyone has to love you, I know it is hard to think about someone you love doesn't love you, but this is not your fault, there is nothing wrong with you, again not everybody has to love you. If you accept that, you will feel better and look for the one who can not spend a day without you, even you get mad at him and break up with him.
Frankly if you love him, then nothing is lame. If you want him back then there should be no doubt about it in your head. Also I would move heaven and earth if I wanted someone back.
If you think this is as much as you can do and can not do anything more then let it be and learn never to trust anyone blindly, no matter how real it looks. If you are concerned about things looking lame, then you actually care more about your image in his head and do not want to loose that. IF YOU REALLY LOVE HIM THEN ALL THIS IS BULLCRAP.
NOTHING SHOULD MATTER. IF THE FEELING IS MUTUAL THEN HE WILL COME BACK. If he does not come back then it was never meant to be.
BEST THING FOR YOU TO DO IS REALLY THINK FOR HALF AN HOUR ABOUT WHAT TO DO AND DECIDE. Also sometimes, time mends things and puts them in order. Don't keep running after what you think should actually happen.
JUST RELAX AND GIVE YOURSELF TIME FIRST. Everybody in life is secondary to yourself since you can enjoy anything or anyone, only if you are happy and sound. Good luck.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.