Super Bowl Nightmare and my problem with being Masc

So i'm at my friends house for a super bowl party last night and it's a mix of people I know and also people from my friend's college. So I'm sitting on the couch with my buddy jimmy drinking a beer, and this drunk sorority girl walks up to me and strikes up a conversation. She talks to me about the game at first but eventually starts coming on to me. She says "What are you doing after the game" and I said "probably going home" then she went on to say "hopefully not by yourself" and then put her hand on my knee. So at this point I tell her "Sorry, i'm not interested" and then she does the straight girl thing and flips out. So I try to tell her that I'm gay and she DOESN'T BELIEVE ME! Good thing my friend was sitting next to me to corroborate the fact that I'm gay. She eventually apologizes and that was the end of it. Here's the thing, I live in a harbor town on long island with a population of like 5,000. However, it's not so small that everyone knows who you are, so this has happened a few times. Because I'm "Masc" people don't believe that I'm gay. When I came out in High School it was the worst. I told people I was gay and since I played sports and wasn't stereotypically gay, people thought I was joking for months. Then when I started seeing a boy I met on tinder from the town over people finally believed me. I took a picture of us kissing and sent it to my friend and she screenshotted it and sent it to a ton of people (which I was counting on). But even when I went to college in a different town like an hour away from where I live people still acted like I wasn't being gay correctly and one guy even told me I was "acting straight". Does this dumb close minded shit happen to any of you guys?