Achoo! SAY WHAT?

So like I spent a couple weeks just chilling and thinking. Thinking about the past and the present girl. I hurt her and never got a chance to tell her that I was really sorry. But now that I think about it, no matter what I said, no words can ever change her mind about me. No matter what, I couldn't just tell her but she once was everything, the highlights of my life. Now all I can say is that she's gone. I tried to forget her but I can't, but I notice that I really don't love her anymore. I actually loved someone new. I think by end of this year, I'm probably gonna screw everything up with her. 2 people I truly loved, One is gone, and one is on the brink of disappearing. Can I keep it going or screw up again? How can you love someone but never find a moment to tell her?