Uncontrollable Sadness

Lately, I've been wondering if it's really true that it is impossible for me to write happy poetry. I used to, sometimes, in Finnish, and I have some saved here and there to prove that. But strangely enough, I cannot recall any in English that had not been somehow sad or dark. I mean, I wrote one the other day that was not all that bad, but even that one had some darkness in it. (It ends with the words 'but whose painful weeping hides us out of sight'.)

For some reason, if a poem is written by me (in English basically all the time, and in Finnish lately as well), it needs to fulfill two aspects to be truly mine: It has to be sad/dark, and it has to have something to do with desperate love. Unfortunately.
If you consider the fact that (as I already mentioned in an earlier post) the first poem I can recall, that I wrote myself, was about a sad wolf, I wouldn't say it's that surprising. The surprising in this might be the short period in high school when I could write happy stuff. Even my stories seem to be sad. The only one I can remember is one in Finnish, also from that period. A very short one, too.
I would really like to be able to write other things as well, not only desperate lovers trying to hold on to whatever's left of their relationship - if it ever even existed. It just doesn't come naturally. I have to force it out, which makes the poetry all sucky...