Does anybody know this music video?

Question

Ok, I saw this music video sometime in late 90's (I think) and I've been wanting to see who sang it.
Its a R&B song, and its a woman who sings it. All this time I thought it was Monica's "Angel of Mine" song but I looked it up and that wasn't it.
What happens in the video : It shows a woman and a guy arguing and then I remember a scene when the guy shoots himself in a locked car while his girlfriend tries to open it.
My sister remembers it but she also forgot who sings the song.

Answer 1

Give me one line of exact lyrics.