My Lagan Love may be positive and lovely, but 'cheerful' it is not.
I'm fairly stumped for female-voice happy love songs. From a male standpoint, the Agricultural Irish Girl is pretty zippy, Courting in the Kitchen, and the the one about the 6-foot-7-inch girl, the name escapes me.
There are chipper versions of the Spanish Lady, but that's not exactly a love song.

"All their wars are merry and all their songs are sad", well, an awful lot of them.