I think he’s still interested in you. Their factor, Mercury, is in your first house. Mercury is in loss in Jupiter’s sign, and Jupiter has no essential dignity and is retrograde. Neither of you are in good shape: Your question.
The Moon (your emotional stake in the matter) applies opposition with Mercury, indicating that you are also thinking about her, but the opposition is a tense aspect, so it does not indicate a trouble-free reconciliation.. but Venus, the ruler of romantic relationships, is very strong, residing in her own sign. Venus intervenes in the completion of this opposition. The Moon completes a trine with Venus, and then Venus and Mercury complete a trine, especially as Mercury (usually the faster planet) turns retrograde on the 13th. There is a slight chance that Venus indicates that she has found someone else, but it could also indicate influencing the reconciliation between the two parties.
Moon in their 12th house indicates mistrust. You know whether it is appropriate or not.
I don’t think it would hurt you to have some kind of contact with him if you want to get back in touch. Something light and non-intrusive. I have no idea. You know what she’s interested in, and you can send her a link to something you think she might like, or simply wish her a Merry Christmas.