What do I do?!!!

So embarrassed right now 😫. So I'm one of those girls who only hangs out with guys because it's easier and I get along with them better. So I'm 16 and my big brother is 18. He doesn't treat me like his little sister (except for being over protective) for the most part, so I hang out with a lot of his friends with him. One of his friends who is also 18 like my brother (2 years older than me) I started sleeping with and doing the whole fwb thing for a few month. Well today I walk into a college class I'm taking for 4 hours straight everyday 🙄 and my teacher had been talking about how he had jury duty for a few months and we were getting a TA instead of a sub. Well, incase you didn't figure it out, my TA is my fwb. He didn't say anything to me because I was late so the whole class was already there and I ran out of class before he had the time to. It's so awkward! What do I do?!