Why cant i live a good life?

Well My mom and day split in '98 n idk wat to do i havent been talkin to my dad so basically my mom is been raisin me for 12 yrs n i miss my dad but he wont come in my life anymore n im 15 deep down inside of me im depressed i dnt like showin it then again my mom is gettin married to some guy she knew n im not very comfortable wit it like it hurts me to see her move on idk wat to do anymore its like my mind went blank on him i tried callin him n he jus ignores me like throwin me out of his life n he is already married to a girl n has three step kids the last time i saw him was in june 4 he barely talk to me jeez idk he is just actin like im a total different person he barely knos idk wat to do bout him