Glad to her you’re not struggling too much over the holidays, most LBS have a really tough time during the holidays so that’s a plus for you.
You are doing well not reaching out to him. No pressure, no pursuit. If he does reach out to hangout, make sure you are in good spirits with a PMA. He is struggling with his own issues now and things may not change until he looks inward and focuses on his own issues. Unfortunately you cannot influence his self reflection and he will hopefully work through it at some time.
You sound like you have a great handle on releasing control and leaving him alone which is great. Focus on yourself and continue changing your behaviors to be the best version of yourself you can. If he sees you happy and growing as a person, he may realize that you are not the cause of his unhappiness.
The comment about If we get back together is interesting. For most of us, when our S leaves, they are at that time DONE with us. I wouldn’t read into it too much because their thinking can be all over the place, but a part of him is considering a future with you. It sounds as if he is very confused but could be moving in the right direction. It’s up to you when to give up, but know if you stand, this will be a long process.
Continue to detach and focus on yourself. If he reaches out, great. If not, try to focus on yourself. Happy holidays