I met the cellist yesterday. And he said I deserve an explanation for why he`s acting a bit weird, so he told me quite a bit more about what it is he`s struggling with. It has to do with his ex, but it seems very clear from what he said that it is about things he needs to get over, he`s not thinking of getting back together with her or anything like that.
His behavior certainly makes a lot more sense to me now, and I do understand his issues. And he said that he likes me a lot, but things are so chaotic that he hasn`t been able to figure out if he sees this as something with potential for being more than friends.

It is good to know what is going on, I was thinking he was maybe trying to get back together with his ex while meeting me at the same time or something. Also, he said he has been so busy these past months he hasn`t had time or energy to think things through, so he hopes that a few weeks of summer holiday coming up now will help.
In a way, this does sound a bit hopeful, he does like me, and at some point he`ll get over his issues from the past I`m sure. But on the other hand, that might take a really long time. And when he is over his issues, he might decide he sees us as just friends. Sigh.