Wilson is asking you to be his valentine in the only way he knows how.
I am not uploading the other ones here. I'll link them below.

T: http://theletterwsartflap.tumblr.com/post/110930307048/wilson-is-asking-you-to-be-his-valentine-in-the

Rest of the Don't Starve cast: http://theletterwsartflap.tumblr.com/post/110958675288/the-rest-of-the-dont-starve-valentines-all-done