Usually if a mother “thinks” you are spending more time with your friends its probably because you ARE spending more time with your friends and you are not paying enough attention to her or giving her the kovod and respect she deserves.
Just because you have friends and are capable of going off on your own and doing things on your own with your friends does not mean that you have the right to ignore your mother or the rest of your family for that matter. You are who you are because of them and they deserve your time and attention to. They deserve to “enjoy” the fruits of their labor in raising you. So make time for them just as you make time for your friends and include them in the things you like to do, don’t save everything for your friends.