WHY does God give us trials?

Often we ask ourselves this very question. Over the past year (my freshman year in high school,) God has tried me many many times. I have had friend issues, relationship issues, family issues, teen issues (lol), you name it, i had it. It was not til i started literally getting on my knees and praising God for those trials that things got better. WHAT? you may ask. Yes, it's true, if you do that very thing and just trust God and give Him your grief, i be dern, you got it! I am studying the life of moses in my bible study every monday night and it has changed my life tremendously. I have developed such a loving relationship with Him that it has changed me completely. I'm still learning and i just crave the word of God!