To the OP (if you’re still reading!), and those like her:
I was always on the heavy side and got married at age 20, B”H. There are plenty of guys out there looking for more than weight, and even many who find girls attractive even when they are not skinny.
In Malky Feig’s Mountain Climbers 2 she has a beautiful mashal (discussed with regards to someone having difficulty in shidduchim due to a medical issue). Basically, when you are doing a puzzle the easiest piece to match is the corner piece because it has 2 straight sides and less options to match it to. Shouldn’t having more options make it easier to match up? The answer is that when you want to “choose” something, having more options is better as it gives you more choices. But if you want to “find” a specific thing, less choices narrows the field and makes it easier. We are not trying to “choose” a shidduch. We are trying to “find” the one specific individual who is right for us. If you have less choices due to circumstances that Hashem put you in, He is making it easier for you to find the right one by narrowing down the ones you must sort through until you find him! When he does come along, he will be attracted to the way Hashem made you! (Obviously we have to do reasonable hishtadlus, but it seems clear from your post that you are doing that.)
May you all be zoche to find him quickly!