I would begin by doing exactly what you are doing: canvassing opinions from strangers and from people who know you well.
List, as oopsadaisy says
Flip a coin, and see how you feel about the result.
Ask your partner how you could make things work.
And another thought:
If you can, rent your dwelling out, and rent a place near your daughter - a good idea anyway so you can look around. See how a long-distance relationship might (or might not) work; see if you like the area as much as you think; see how your partner feels about visiting you there. You will have burned no bridges - unless your partner is annoyed at the idea, and that might give you pause for thought.
A distant aunt of mine kept her own house when she entered into a long term relationship in her 60s. Her partner kept his house as well, and they shuttled between their 'town' and 'country' houses for about 20 years until old age caught up with them, and by which time their children and grandchildren were at different life stages.