I like how you can see different meanings within the poem...I can see it either as someone wanting to share their feelings with another person, but also it could be warming them up with their blood, or trying to revive someone from the dead. Like if someone was deceased, and you wished that their blood could still flow by using yours.
Anyway anyway, as for feedback I guess I don't really like the line "of ocean blue." I don't think it adds much to the poem besides a rhyme, which isn't really needed. It also doesn't really seem to fit in with the idea of the poem - if your veins are cold and blue, then why would you want to share that kind of sad feeling with another person?