Need Some GOOD Advice (drugs)?

Ok, well I guess I'll introduce myself, my name is Alex i'm 15 and i'm in grade 9. I'll start this story from the very beginning i guess. It all started in grade 8 in elementary school, Me and 3 other guys would go to a little store at lunch and chill out behind it, and then about more then half way in the school year they, started asking if i would like to try weed, and i did because i wanted to know what it was like to be high. they told me what it was like and got me very excited, all i had to do was bring in my chip ins (10 dollars). So i tried weed for the first time, and for some reason i never got high they told me i don't inhale so only practice would get me high, i started getting high like once a week, and my eyes would never go red or anything and i only felt a little high.So the school year was about to end. And the first time i got baked was at my friends place it was the highest i ever was, i never got that high again, and i still have gotten very baked, but then again i used a can so maybe it could of been the fumes from the can? Anyways it was summer and i was sober all throughout summer because i didn't have a dealer i got those guys to get the weed for me. And then once grade 9 started i forgot all about weed, and i was happy because it was the start of high school. I was having a good month and i think it was about the second month of high school is when i was introduced to weed again. I bought some and got high with some friends, and this time my eyes did go red and i would have a ****** up laugh, but for some reason i always got higher then the others, my bro said its because i take rank hoots, but still not sure. I started buying weed like every once a week and my friend would chip in and we would find some guy at the smoking corner to buy weed off of. (btw this is a catholic school). I got 500$ because my mom ran into alot of money so i bought some ****, and i bought a 60$ pipe and weed. We were still beginners at weed we didn't know alot, but we started meeting new people and what not. Anyways 5 months later somthing like that theres only about 2 months of school left. And me and my bro have became huge stoners, we now get high almost ever school day at lunch, and i always have red blood shot highes, but i don't have that ****** up laugh anymore, only if its good **** i smoked. Anyways all my teachers complained about me and my friend always being high in class,Me and my bro would also always skip school go to this chicks house she would call in for us and we would do blades and **** like that.Recently the principal gave me an option to see an addiction counciler, and if i dont im kicked out of the school forever, and thats where most of my bros go, if i dont decide to go i can always go to a different highschool but IDK i just don't know what too do anymore, Btw I only smoke weed as a hobby (well thats what i says, idk if i'm just using it as an excuse or not) theres nothing else to do in this god forsaken town. I don't wanna quit weed, but i wanna stake in the school at the same time... What should i do?