Maybe this is a good chance to reject Valentines day entirely?
I loathe the whole concept of it. I found it easier to deal with when I was single - because nobody expected me to do anything with it. Now I sometimes get asked if my SO and I are doing anything for it - not usually more than once by the same person, though.
Yesterday, I sent a happy valentines message to a lovely friend of mine because I know she's into it and is single and not happy about being so right now. I sent another one to my friends who are married to each other (they got together on a big group valentines night out 21 years ago - with some help from the whole group
I took C for a walk in the countryside, ate dinner, spoke to my SO on the phone (as we do daily) and went to bed.
Thankfully my SO feels the same way as I do about Valentines day so we don't exchange cards or talk about it - other than to express annoyance about the whole thing.
I say ditch the whole thing - it's way less stressful than putting a whole lot of expectation and pressure on a single day.