Yeah - this!
I would wager my pension that when Coco is belting round your legs, he's also being vocal. Little grunts - soft but not aggressive. He is happy and yes he loves you but right now, you're his 'love interest' for only one reason! Has he wrapped his front paws round your legs yet and, well, you know....? If he hasn't, he will. It's all perfectly normal and he's just doing what his hormones and rabbit brain is telling him to. The neutering will pasify these behaviours - and I think most of the posts above mirror this. It'll take a few weeks to take effect but whipping off the conkers not only kerbs the enthusiasm, it also helps to prevent cancer in that region. So it's something you'll need to consider with your vet. You could look at maybe a soft toy rabbit or something in the interim. It will serve to get his attention and occupy him when you are not around.
But long term, and after 3-4 months post op, he would really really benefit from having a wife-bun. It IS a commitment and something you do need to consider. And there's so many people on this forum who can give the most wonderfu advice about bonding and pairing of rabbits and it is a satisfying and special thing to do. Good luck with it and I hope things work out.