I think Ingrid is a very beautiful looking person. Of course that isn't all that matters in a relationship...but it's all we as distant strangers can really judge. She looks like both a hard-worker and a free spirit, whch are admirable qualities to have in unison.
As a similarly 'reclusive' type (all the time I am not at work I spend alone) I find it rarer and rarer to connect with people. But when I do it feels so warm and intense that I have to be careful not to become consumed by it. Of course those people drift away - it's got to a point now where I feel I am meant to be alone, and I know could never hold up any relationship other than to myself - but I still hold on to the memory of that connection. I would love David to still remember how he felt when he was with Ingrid, even if he has no desire to return to that state... I find those kind of symbols and ghosts to be most comforting in cold times even if I do embrace the frozen air. I don't find it strange to enjoy solitude so much... as long as you're not afraid to be around other people. I would hate to be the only one in this world but I am quite happy to be the only one in my space!
As for the ring, rings are cool. I wish I had a ring.