Most Helpful Guy
Most Helpful Girl
Sit him down, face to face, sweetie, and with what you have Regretfully have gotten yourself Into, it is Now time You... Come up with a believable excuse.
Tell him you are only 'Under18,' that things are moving way too fast for you. Tell him he is super great and loving and kind and loyal and all, but you are not ready to be a steady betty for anyone and friends is what you would prefer.
Don't feel bad if he is sad and cannot be this 'Friend' in need indeed. This is this sort of Prince Charming that many girls are 'Lucky' to find and it is nice that this spice has started while he is wet behind the ears in years.
Life will go on after this and of course things will 'Change here, dear. Nothing in life ever does stay the same and in getting older, you will also Get bolder, and see all the differences beginning now.
Good luck. xx