I don't want to delve too deep into the meaning, as most poetry are supposed to be felt and not understood.
I think you both ain't dumb ngl so don't talk down on yo selves! #-.-)
I think you can associate the uke wanting to be born in spring as renewal or rebirth. So in a sense, he'll wait for the teacher and restart all over again (I'll assume the seme is born somewhere around winter) winter is the opposite of spring; feelings of struggles and being 'stuck', which may refer to the uke's amnesia and the accident.
So maybe if he was born during spring the accident may not happened? Idk man
this is so poetic but im so dumb, does this mean he'll wait for teacher to love him til the end? And teacher is willing to try and love him romantically? I guess, yes to both?