Who's it from?!

This morning, a valentine card turns up. (secret admirer at last I thought). But, looking at the writing, although I don't recognise it, I think it could be the same fella as last year. This has happened every year, and each time, there has been a little ryhme in it. Roses are red, violets are blue, sugar is sweet and so are you. This year, it also had: guess who! I love you! I don't recognise the writing, so who it appears to be remains to be seen!