How casual is too casual? Sex/hookup advice?

I'm 16 & my body count is at a 3- I lost my virginity to someone I had just met and had come over after being pressured and was too drunk at a party to even recall all of my second time. Since then I've had one sex partner(a friend of mine) and a few casual hookups, some of which included blowjobs. Today I gave a blowjob to a boy I started speaking to Saturday and met up with today. I'm comfortable with my body and what I do and I was totally in control of today's situation but I want outside opinions and is it fine to go up to blowjobs during casual hookups or is that already too far? How many times have you ladies given blowjobs to people that weren't your boyfriends?