My boyfriend saw me kind of naked! Is it okay to be embarrased...?

He was at mine to see me and my brother because they are friends and we are together...and I went in the shower and I came out and went in my room and had just my bottom undergarments on then he came in and asked me if i had a ps3 game they could borrow...and then he started smiling and i was like 'Get out...I'm indecent!' and then he walked out like nothing had happened and now I'm going to be really awkward around him and I'm scared he's going to tell his friends...I'm 16 so I don't know if I should have been embarrassed or not. It's not like I'm deformed or anything...