Is it normal that i feel this way

I used to smoke mad weed,drink & get any girl I wanted. Use to be the center of attention and all of that. Then i got a girlfriend and started thinkin about "LIFE" in the future so i quit everything and became a sober person for the good being of myself and im about to get this highpaying job that alot of people wish for but still find myself not bein so happy about alot of things. I may act like it but i hate not being able to be fully happy and what i mean by happy is.. Laugh like for real and not push out an utter that appears simalar but not the real thing. Or being fully satisfied with my accomplishments like getting my G.E.D or getting a shot at a big company this is stuff alot of people would find excitement about but to me it isnt..
My girlfriend has been a big help for she strays my mind away from everything else most of the time. I have an amazing family but still see the other members more Glad to be here and having a better time. Seems every single friend i had in the past is no longer on talking terms with me because i changed my ways or because they have back stabbed me to the fullest, along with close family members. Which makes it hard to even think of makin friends because what i thought were my best friends turned out to be my greatest enemy. Not sure why i cant find full happiness in myself when i still have so many great things with me. Pretty strange and makes me feel defected unlike most people that can laugh there ass off til there stomach hurts. This is like the first page in the dictionary compared to everything else i have on mind think this may be to long for most to read anyway so time to cut it short.
Am I NORMAL to feel this way?