Sorry for the name change but I don't want this linked to my usual one just in case.
Super awkward, I live in a small village hamlet, (only relevant in thats everyone know everyone else) I'm in a committed relationship, dp moved in with us a year ago, all good 
I'm usually no nonsense and very straight talking but I'm not sure how to handle this sensitively. There's a middle aged single, very nice guy who lives a few doors down, we are on saying good morning and occasional taking in a parcel terms etc but nothing more. I had a large bunch of flowers delivered today, from him, with a happy valentines note. Initially I thought it might have been a mistake, but no, he messaged me to ask if I liked the flowers and if I'd like to go for a drink. He only has my number as there was a village issue a while ago and we needed to contact each other regarding that, this is a new thing.
I don't want to embarrass him but this isn't appropriate, and I need to move on without awkwardness if possible.
How would people handle this, ignore, message back, pop over to see him and explain......?
Thanks.