"
He said I wanna see you again but I'm stuck in colder weather
Maybe tomorrow will be better, can I call you then
This can have a lot of meanings but to me it means: he is having or going through tough times, hence "colder weather". He is leaving her for now because he doesn't want her to get caught up in his own problems. "Maybe tomorrow will be better": He is saying here that perhaps another day he will come back and be okay again.