When I read the title, I thought that it is yet another story about ONLINE flirting with someone you have never seen (a phenomenon I fail to understand from beginning to end). You are actually having a relationship with a real human being, someone whom you actually knew, many years ago, etc. etc.

So everything seems normal to me. There are many ways to approach it, none right or wrong, but you should stop calling it "my online crush" because it is not. It is a normal human relationship. Multiple attractions, feelings for one person while respecting another etc. are completely normal and a normal part of human existence. What is not normal, to me (maybe because I am 42 and grew up without the Internet and cell phones), is attraction to people who are virtually anonymous and only manifest themselves through technology. You do not have this problem. Your crush is a real human being.

I do not know to what extent it helps you resolve what you view as your "problem", but I just wanted to say that nobody should feel entitled to judging you and whatever you are going through is just part of life.