I believe my friend has a better life than me and i feel jealous?

ok i dont know how to start this but hi my name is carlos and im in 8th grade and i have this friend named samuel aka sammy when he came to this school he already knew everyone in the school with only 2 months in the school he appears to have no problem in his life hes always with a smile makes jokes that make everyone laugh he acts like a cl clown he usally changed personality this year with his all skating or hes a skateboarder but i really havent seem him skate at all hes not a friendly guy most of the time he basiclly makes fun of people including me i believe hes popular cuz basicly he cut his hair like an emo. and we where friends just talking no problems at all with each other and he one day i couldnt never ever forgive him i told one day which he said who do i like and said angelic a girl which he started flirting whit her (alot) everyday and one day i couldnt believe my ears that he asked her out in front of me and kissed her her to this day one day i couldnt take it anymore he makes fun of me by the way i dressed until one day i stood up to my self and punched him in the face the result of that was that he was so terrified he was pale he was at the ground holding his face crying when i kick him in the rib hard and gets up as fast as he could to get out of my way. but this was a year ago in 7th grade. so in the end of the year he came up to me and said he was sorry of all those problems he caused me to hurt him and i accepted his apology. till this day he still cuts his hair like an emo and also acts like a bigshot most of the time like now he plays basketball and now and i took soccer which ended up a year ago. and now that its 8th grade he got accepted to the high school i wanted to go to and now hes bragging about it and i didnt get accepted there. so there thats why im so jealous of him. Oh did i mentioned that one thing that im proud of that he doesnt have is a girlfriend named ariana and he doesnt have one.but deep inside i know not everyone has a great life each living person has a big problem in their life that affects them alot. so i still feel jealous of him as im writing this down im thinking how better he is at life than mine so please of beg of you to help me in this problem.