Can you prove she isn't talking to the OM. Also, the OM broke up with her. You still are not her first option. You have to gain your respect and become attractive in her eyes. You have to make yourself a person only a fool would leave.
IMO, this a tough one. If you stick around, you will have to still give her space and let her come to you. You don't need to follow her around. Just be there, leave her be, and if and when she is ready to talk she will seek you out. She will try to pick fights with you, you have to be ready to not react to nothing she does to try and get a reaction out of you.
M:37 W:37 T:11 M:10 S17, S13, S10, S4 BD:06/28/17 OM confirmed 07/20/17 Recon the M 10/29/17 Working hard:2gether
Onward and forward
This process is not a sprint it's a marathon! Patience, Patience, Patience.