You broke through the truth barrier with your friends - that's the really hard part and congrats to you for having the guts and trusting your friends to do that.
Next step, as you say, is to just make it normal. Your friends can't do that on their own - they have no model. They may want to, but they don't know how. You have to do this for them. You make it normal. Don't avoid the topic. That would make it rare, special, and definitely not normal. Don't put your friends down or criticize them, but don't cater to their comfort either. Speak up when someone is attractive. If you are dating someone, don't cover up the pronouns. Resist the urge to hide or "pass".
You might think that this would annoy your friends, but it will actually have to opposite effect. If you are comfortable with your sexuality and place in the world, then they will be as well. They will take their cues from you. If you hide or try to "pass", then they will think that they have a responsibility to keep your secret. Things will get confusing - when are you "out" and when are you "in"?
But the key is that you set the example and they will be happy to take cues from you and not have to guess.
Good luck! Aren't you glad you don't have to pretend to be someone else around your friends?