Hi Wohochi,
It’s great that you were brave enough to share your true feeling with your ex.
Now, the ball is in her court. She has to choose.
If she dumps her new bf to be with you, then that to some extent proves she has got over whatever problem broke you two in the first place and is happy to start again.
If she chooses her new bf then I’m truly sorry but that’s just the way the cookie crumbles.
It wouldn’t be right for you to force anything, it is her decision.
The absolute best thing you can do is give her space, go out and meet as many new people and have as many new experiences as humanely possible. Best of luck my friend and well done on telling your ex how you feel, a lot of people in your situation wouldn’t have the guts.