First, let me say...stop being disheartened. Did you get into running to make friends or improve your health and your life.? In my opinion running is a solitary activity, not a group social event.
With that said.... to answer your question...
Yes. But we're all judged on our looks, and we all judge other people based on their looks. So I say....get over it. I'm black every single day. Do people wanna hear me whine (that lady looked at my hair funny, that sales clerk is ignoring I'm at the counter while she helps the white lady who just walked up, etc. etc.) about what that means. No. Do I wanna hear people who are big (which is mostly because of choices they've made) complain that they're judged by their size, and not being accepted? Not really. You're not going to be accepted every where, every day. If it's a big enough problem for you...then lose weight; which it seems you're doing (which you should applaud yourself for, it's hard to lose weight). Just make sure when you're down to a size 6
from all the running (and eating right) that you don't turn around judge the next "big" girl.
Good Luck!!