I lost my passion/enthusiasm. I need help!

Hello everyone. My name is Alex, and I am 18 years old. I've been playing Dota for almost 3 years now and since I was 16 I wanted to become a pro player. When I first discovered the game, I didn't even know you could make a career out of it, and I played just for fun, but more as an obsession. I was playing before school, at school and after school every single day. I used to play 11-15 hours/day non-stop and sometimes I even forgot to eat. It was so cool, because I was improving so much and I was enjoying the game so so much...so after I realized I want to become a pro player I trained even more and even better. I treated every game seriously and never gave up until my ancient hit 0 HP... but somewhere along the line something in my heart changed. I think I lost my enthusiasm...and I don't know why. Like..if before I couldn't wait anymore until I started to play in any day, now I can't wait until I stop playing in every day..I'm like: "ugh, gotta play 4 games today..**** it*. AND I HATE MYSELF. Why am I like this? What happened? And most importantly...how can I recover my former self? Sure, maybe playing 11-15 hours/day isn't beneficial to my health, but I should play..idk more than now and not for obligation, but for fun. So... how do I regain my passion? How do I reignite the fire I call enthusiasm? I'm willing to try anything and listen to any advice even if it says to take a break for 1 month or something.

P.S: I'm not interested in any way in answers like: "You're no good, give up dota and do something useful with your life"...you get what I mean. If you want to post an answer like that, don't even bother, and to the people that actually want to help...well really thanks. It means a lot :).