Yes it does mean you're moving on or more precisely becoming stronger. You're realizing you're complete on your own, you don't answer to him, you have options and choices and you choose to not desire someone that doesn't value you. You're worth more!
As for the what-ifs...well if he truly misses you and wants you then he'll make the effort. I waited for my wife for 2 years, I made changes, I became a different person, I recognized my own flaws and owned up to my mistakes I proved to her I cared and loved her. It's about actions not lip service. While I don't think anyone has to choose the route I took nor did I know what I was doing at the time but what I did know was I couldn't give her up so I did everything in my power for her but also for me. What your H's done (nothing) so far doesn't speak the same to me yet. Ultimately you decide what you want to do, you know him best but don't fill yourself up with hopes and dreams because of one text. He's got to prove he wants you and he can start by appologizing and owning up to what he's done wrong. Perhaps then there could be a level plain to have a mutual dialogue about what you each did or didn't do in your M/R. He can't just waltz back into your life like a drunk chipmunk.
Goodluck on your exam!
Me: 35|WAW: 38|D: 6yo | http://tinyurl.com/2dxx7m6 Feb 2006, left, came back in two weeks Aug 2006, left again Apr 2007, filed for divorce Dec 2007, reunited Mar 2010, moved out, filed again