Is it normal that i dont like whom i've become?

Hey I have lost a lot of weight I went from Obese to Overweight and I am still on a diet.
Lately I feel bad because my personality changed along with my body.

I was a very funny person to be around, I used to make fun of myself all the time and now I can not do that because I am not Fat enough. Also as a waitress I used to say "trast me this food is delicious" and sawing my belly at the same time! Everyone ordered what ever I recomented. Now they look at me like "what ever".
But all that I can work with.

What is upseting me the most is that I used to judge everyone as hard as I judge myself. So now I am hard on ppl who say staf like "I have tryied everything, Or I dont have time, Or I dont eat that much that is the way I am!" I confront them in a way I did not like when others did to me.But I cant help it! I want to help them understand that this is not true!!! They can do it!!!

Pluss I am angry with some friends that they say I have lost enough and I need to stop now, when I am still OVERWEIGHT according to DOCTORS!!!
They say "what is your goal then?" I respond the lowest weight that gives me the right BMI. And they say "WHAAAAT that is even lower than what I am!!! You wont be healthy or you wont be beautiful it wont suit you!!!" Then I respont "We will see that! I will go where my DOCTOR say I should and if I dont like it I will gain some buck"

But all i want to do is punch them in the face!!! When I was Obese ppl still had an opinion about my weight and it never bothered me! Today If they say something I am mad!!!

Plz tell me if you have expirianced something like that and do you feel like I am terning into a bad person mean with Fat ppl and angry with thin???