Franky,
People who knew you before you started changing everything about yourself are going to give you shit if you start making drastic changes because they are either (a) jealous of the new attention you might be getting if you're making positive improvements or (b) complaining that you are trying to be someone you are not.
The best advice for either of these? Ignore both of them.
If your social circle is really giving you a hard time about your changes, then you'll need to reconsider whether or not these are the types of people that you want to be hanging around. If they are always dragging you down and not providing any type of value to your life whatsoever, then you can always cut these people from your life and form a new social circle with the types of people you DO want to be around. You want to look for people who boost your overall value -- not try to suck it dry.
Do what you need to do to make yourself the man you want to become, and in the process, feel free to start re-arranging your circle to include only the people who provide true value to you as real friends. =)
- Franco