If you're confident your two friends won't out you, you could figure out along the way who else will also be safe to tell later. I understand though, learning who you can also trust to never, ever out you without your permission can be tricky.

As I've learned, if you like/really like/love them as friends, expressing in some way that you do, and that you want to become a bigger part of each other's lives because you value your time together, is very important. Sometimes people are already looking for people who value time with them enough to want more closeness, and need a sign who of their friends is that.

I realized I couldn't know for sure if my friend didn't want the same. Just like you they could desire the same and have any number of their own reasons to not have transparently told you.

Remember capitalism creates atomization that makes people act anxiously distant in their own bubbles. It increases the number of times people think "If they really cared enough to bond more with me, they would've insert sign of interest by now." I wouldn't be surprised if this has applied to most members of the human race. In retrospect, many people really liked me but I wouldn't vulnrably show how deeply I wanted more platonic intimacy, and it cost me(and still costs me) close friendships and lots of socializing experiences.