Help finding this song!?

Help me find this song please! Been searching for ages! It's an RnB song by a black male artist, cant really remember the lyrics (sorry!)..but its basically about this guy saying he loves this woman (he's talking to her in the song), but she's with someone else...and he says he can love her better than him (the other guy) or he can love her best, something like that...the video was shot in black and white. It starts off with the guy meeting his girl friend at some sidewalk, catching up, and just when things start to get good, her phone rings and it's presumably her boyfriend...please help me! It's been driving me crazy!