I’ve seen this movie ages ago. It was french black and white movie from the 60’s. Could be a french new wave movie. There was an angel who fell in love with a girl. Also I think I remember but not sure, is that she tried to commit suicide and he saves her. It was winter time, there was snow outside. And there was a scene at some house party maybe. My memory about that part is fuzzy, but for sure it was french and about an angel in love.