Here it is nikka, Da TRUTH.
She left you because she found this other man that she wanted to start a relationship with. She became intimate with him either shortly before/after ending things with you. As we live in the modern age where everyone fux first, dates later, they didn't actually become a "couple" till a few months after the break up with you.
Now, some time has gone by and she is wanting to lay some bridges. She messaged you, but who else? Possibly a few. Does she want to start things back up with you? She is open to the idea and making sure that the possibility of it is in the cards.
A: Play cool, run your game and maybe get her back. Or, maybe she won't be interested in what you are offering once she is reminded of who you are.
B: Ignore her, why bother with such a manipulative woman? If you blow her off, you basically just put her on pause. That is, if at some later point you decide that you want to go for option A, the opportunity will still be there.
So, my advice is for you to decide what you want. Are you better than you were then? The things that you have that this new guy doesn't, have they grown? She is thinking of you as an exaggerated contrast to this new fellow. All the things that she likes about you had better be definitely there if you are to pursue having her.
Wemenz always talkin bout what men do but aint nobody be talkin bout what wemenz do.... atleast till now