So called friends.

Some people just suck. Try not to give anyone else’s opinons/comments too much weight (I know easier said than done!). And if you find that some people in your life are consistently being negative and bringing you down you may want to consider if it’s worth keeping them around.

First, congrats! That's amazing for only 3 months! I think I would have said, "I'm sorry. I don't recall asking for your opinion."

38 lbs is a legendary achievement ... I would assume he was being careless, or just teasing/ribbing you as men often do.

I have 38 lbs to lose myself (I've lost 13) .. so I can deeply respect how you had to grind it out ... but that dude ... probably doesn't get it. I would assume it's more oblivious than malicious... I wouldn't write him off over it.

My friend took some embarrassing photos of me at their pool ... sent them to me and laughed and laughed. I blew it off. He then posted them on my facebook wall... that felt to be too much.

Context and audience is everything.

You admit the shirt was a little too tight as you are still trying to lose weight. Maybe your friend was really being friendly in suggesting you wait a little before wearing it.
Some people are just not tactful. It's your friend you know him/her and you know how they usually talk. And we don't have the whole context of the conversation.

The things people say are always a reflection of them, how they are feeling, what's happening in their lives etc. Try not to let it get you down. If it really bothers you, have a conversation with your friend about it; he could just have been "bantering".

As an aside, your reaction to what was said should give you an insight into an insecurity of your own so try to address that and work on yourself. At the end of the day, the only thing you can control is what you do, how you respond etc.

You said two things that matter;
I'm very proud of myself.
I do look a lot better.

There will ALWAYS be critics out there, no matter what you weigh, how you look, or dress (Many of them are insecure themselves, which is why they make comments about others).
Even when it does bother you, try to focus on those positives above.

All that really matters is how you feel about yourself.

Nice job on the weight loss so far!

i went through something similar as you. so i do kind of understand how it feels. i had a friend for many years, he was always like the leader of our social circle kind of guy, the fit looking one, and more successful one in the group. when i started getting into gym to lift weights, my body started changing. the fat was disappearing, my chest, shoulders, lats, glutes, and quads were just bulging out even though i'm not that fit yet. but it was obvious to people i've been lifting. we haven't hung out for a while because of things going on in our own life, but when we did arrange something and finally hung out again and he saw my body changing that's also when our friendship started to change as well. he would constantly call/text on every friday to invite me out to drink beer/liquor, pick the most unhealthy restaurants to eat at, offers me cigarettes, and when ever i try to refuse he would do his pressure trick. he would say things like oh, you change, you were never like this in the past, you were such a fun person before, now you probably think you're too good for us, and etc., sometimes when we hang out as a bigger group with more than 5 people, he would start bringing up old stories about me and not anyone else, it's always me. he would be like oh he use to be fat, he had boobies and a belly, so clumsy and klutzy, everyone would start to laugh at me and tease me, asking if my boobies are still there, and i just feel like he was doing it on purpose, trying to make me look bad, he would always trying to put me on the spot to make me look stupid, put me down, make me feel bad/negative. he has never treated me like that in the past until my body started to change.

but seriously though, no matter what we do, there will always be haters and lovers out there. over time i started to realized, i did change, and i changed for the better mentally and physically. we just can't be friends anymore, although it's been a long friendship, we had ride or die moments, been through deep and thin for years, and etc. but sadly i felt that it is time to end it because you know what they say, you become those you hang out with, and i don't want to become like them anymore by going back to the "smoking and drinking, getting home drunk at 3am every night" days. some people can't handle changes, some people are jealous, ignorant, arrogant, some people just dislike you when they don't even know you just by judging you by the way your look, and there's just nothing that can be done, there's just no helping these kind of people and it's better to not associate with them either.