Is this change good?

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I noticed that earlier i used to give a lot of importance to my friends (they are still very important but now i give more importance to family and work). I used to call them a lot and answered each and every message almost instantly and still never used to get much in return in terms of how much they valued me as a friend. And now i have gradually changed and reply to friends after i have finished my work, or when i am not with my family, or when i am not with some other friend, or when i am not reading a book (that's one thing no one can replace in my life coz i love my books). Now rather than trying to do every thing for everyone i give my 100% to the one who is with me currently (or to myself) rather than talking to someone else on the phone while i am with a friend. But Somehow i feel i am taking it overboard and talk to people very less. I am confused they say i don't give them enough time now, but i feel if that's true how come my phone bill is still way too high, but come to think of it, I agree i am spending very less time keeping up with them over the phone. But maybe it's because i used to spend way too much time on the phone earlier. I just want to ask is it good that i have changed?