I'm not going to make a big deal about my friend coming out as gay
Why wouldn't you make a big deal out of it?
It is not my business and I'm not surprised at all.
That sounds fine. You don't have to make a big deal about everything and accepting your friend is the most important thing.
Really? It seems like you're attacking me.
Not at all! I agree with you, as long as you are accepting of this person then you don't have to make a big deal out of this.