"To all young couples I see together..."

Now, it is just a hunch. But I couldn't help but think that the fact you were scrawling graffiti like this in the toilets of the British Museum might, just might, be a clue as to why you find yourself in the relationship predicament that you do...

"To all young couples I see together, f&%k off. I should be with a wife or girlfriend, not by myself."