I am like you too.I am slim but my hips are wide.I think it is from my dad's genetic.Some of my friends been telling me the same thing and yeah also people that I am not close with.Wide hips look great if you have a balance body proportion.Also,when you wear tight dress,it enhances your body curve so be happy about it.Your friends are just jealous because some of them wish they have a body like you.Do not bother about their opinion if you are comfortable with your own physical image.
Since, you haven't explained your situation in better detail.
Compare yourself to these women celebrities who fall under the acceptable BMI, have wider than average hips, and considered to be very attractive by most men:
* Jennifer Lopez
* Nicki Minaj
* Vida Guerra
* Nicole Austin
* Sofía Vergara
* Eva Mendes
Also compare yourself to these women celebrities with big asses who don't fall under their healthy BMI:
* Queen Latifah
If your hips are anything like the first group, then you should be fine. However, if your hips are like the second group, and you have a skinny waist, then they're comically wide. You probably could go for liposuction in that case.
As long as we are not talking TOO wide. Otherwise the proportions look weird. To know whether your 'friends' are accurate or just being unkind, I'd need to see full body shots of you. But I doubt they stand out THAT much.
Oh hell yes! Don't get me wrong, I am pretty indifferent when it comes to female shape, but, knowing that there is (pig part of me, don't get offended) a nice ass, b-e-autiful curves on a girl, and a fit body, you have nothing to complain about. you may not notice it, but men all over are drooling over you. So tell your friends to fuck off and tell them to get an ass them selves, asses that they can be proud of. But all in all, doesn't really matter when it comes to curves or not, (I mean yes it helps) but be one of those cool chicks. Not those hussies who have a tendency to fuck every jock in school, but one who can hang out with both genders, take a sexist joke, and handle the occasional hooting and hollering towards your looks. Be down to earth, 80% of guys like that.
Personally I am a male and I actually like the larger hips on women, I think it looks more attractive than a slim hipped girl, it makes you look more feminine and makes clothes look better on your body.