I think it would be easier to 'sing trough it' if you would put some genre information to it - and maybe some tempo notings. I think its supposed to be kinda slowgoing sang on a clear strong voice with loads of pitch changes. But one cant be sure unless one is given some sort of direction for. Otherwise its flowing quite nicely as love lyrics should and on the other hand they are more like hmm, should i say missing someone or afraiding. Some lines are really strong in emotion as: "we'll stop stayin up late at night someday turn off all the lights of love" and they really capture the reader or listener. And in someways i felt hurt as there are some - well kinda 'scary' points to be honest. Scary for relationship and love.
So if you wanna improve it in anyways - i suggest you tell the reader or 'listener' what kinda music it is, and maybe add some sidenotatins into it.
Anyways nice little lyricstart there, hope oneday you will post the full version of it. Maybe something that brings some sort of conclusion but leaves lots of holes for 'listener' to contact it with his/her own life and experiences. ( pretty much as you have done already ). Hope this helps! :)