Possibly the point you're missing is that no one cares about how you look.
But they probably do care about how you feel, how happy you are.
Either that or they're deliberately targetting you and feel even more insecure themselves.
They're probably your friends because they like you as person.
You've deliberately shut off advice about losing weight - by stating you're trying to address this.
But seriously - how many summers have you felt unhappy about clothes and what you're wearing?
And still no one cares about what you look like.
No one but you.
They obviously like you because either "you fit in" or you have "values" they appreciate.
So who are you dressing for?
There has never been a better time to be fat, with all the body positivity and generally most clothing houses doing plus sizes.
So do it in small steps. Buy a maxi dress. Feel comfortable.
Find a diet - an every day diet - that includes all the foods you love. A forever diet. Eat chocolate. But try to restrict it to 14,000 calories a week.
Your biggest challenge will be - how do I eat 14,000 calories every week and feel happy and not deprived. Because until you work that out, you can never maintain your weight, at any weight.
You can eat anything. You can do a full Sunday roast or eat pizza. But you need a normal every day diet like all your non-overweight friends.
You just need balance - not punishing yourself.
Then set yourself a challenge, now the evenings are long, and walk your streets for half an hour, 3 nights a week.
Seriously not kidding you. 68 year old woman who was not fat. Maybe stocky. I see her every Sunday. She doesn't work, but this was through winter over the past 7 months. She got a watch step counter. She set herself a challenge of walking 10,000 steps every day. Didn't really notice until she started looking different. She's pretty sound mentally and emotionally. But apparently walking 10,000 steps every day can have a dramatic effect. Trust me she was a slight nutter, as in pushing her mother out for a walk to complete the 10,000. But hand on heart, she's lost just over 3 stone in 7 months.