Well I've been friends with a group of guys for many years now, an we have all been through a lot together. We have all been single and in relationships over the years, I ended my relationship a few years back now and started leading the single life with my single friends.
My relationship was incredibly abusive which was hard on me personally, my girlfriend was very emotionally and mentally abusive which made a lasting impression on my confidence and self esteem.
My friends at the time helped me through some of it which I was truly grateful for. Then one day I decided to sort myself out, I hit the gym and I've never looked back. It was the best thing I ever did, I'm proud of what I've achieved over the past two years. I've even been asked to do some model work, but I'm not the kind of person to be big headed about it. I won't tell my friends about this though out of embarrassment.
I'm just thrilled with what I've done. Some of my friends have even said how good I look which I'm thrilled with because it's nice to hear a positive thing said instead of someone pulling me down on a daily basis. What I have noticed though is some of my friends when they hear someone say how good I look they pull a face and make a remark about what people say to me.
I don't understand why they have started to do this? Some of them have better jobs and nice girlfriends, I'm still single, yet I'm made up for them I can't get bitter.
Even if I meet a girl when I'm out, they pull a face or say she's an idiot then ring me every day and ask about what's going on with that girl. I never ask them about their personal life as it's none of my business. I don't understand all this sudden change from them, more so my friend who I’ve know since I was four and seems to be the
Worst at the moment. Out of the whole group of us I'm probably one of if not the quietest.
Of the group
Sorry its long by the way.

Jealousy is a basic human emotion - sometimes people can't help it. I'm sure they are happy that you are doing well, but not sure how to deal with the "new" you. If you have all been friends for years, I'm sure you each play a "role" in the group. Maybe you have stepped out of your "role" a little.

If they are truly your friends, tell them that they are hurting your feelings. Be honest.

Thanks for the advice, I may confront them about it, but to be honest I don't want to show them that I am bothered. My role within the group possibly has changed, I'm just more confident and I think they can't handle it now. Hence why their always trying to put me down or stop me from doing something. But I still think that this has defined who my real friends are, as they never involve me anymore so I'm beginning to move on

If you aren't looking for this attention, just remain humble about it and focus on your friends so they can see that you are not self-absorbed. If you are always on the prowl for women, wearing stuff to always show off your new body and stuff like that, they may just be wondering where the humble friend went, and want to hang around that guy instead of Adonis. If you are simply newly confident, better looking and happy but not making a show of it, they are just adjusting - cut them some slack, and again - make sure that when you speak with them, it's not always about you - and they will either adjust to the changes you've made, or not. Some people don't like their friends to grow.

I've found all sorts of people sabotage my efforts to loose weight - it's clear I need to drop about 50 pounds, and I'm serious about doing it and have asked them to be supportive and not try to pull me off track, but some are already jealous of what I might become comparative to them because they aren't ready to do the same. What can I do? I am moving forward with my plans, not expecting them to change and talking about other things - like what they are doing to build themselves up like their positive new relationships, or the changes in their careers they are training for and so on.

Thanks for your advice, I am very humble I'm not the kind of guy that shows off. But I've asked them to come with me but they won't so I train on my own. I am more confident and happy about myself but never bring myself up in conversation unless I'm asked. Im just for the first time in years starting to enjoy myself again and thought their reaction would be more of a good on you type of thing when in fact its been the opposite. Whenever they have done something with themselves I'm the first one to congratulate them. I suppose not everyone is the same though.