There is what we often call the “Floor Ignore” – all you do is sit in the same area that the rabbit is romping in – be it a full room or just within an X-pen. Then, just read a book or magazine. This lets him play all he wants and he can come to you on his terms. Usually, you don’t want to try and pet him whenever he comes up to you but only when he gives you a nose bump or a little tug with his teeth. That’s rabbit speak for “Hey, you, slave! You may pay attention to me now.” And if he hops away, just let him do so. This will let him know that you are no threat to him. But what you are doing now is good as well.
You should though take him to a vet at your earliest convience. It is always good to get a new animal checked out immediately. It will give the doctor a baseline data read for future visits and you can discuss altering them then (if it hasn’t been done yet). Not to mention, about 15-20% of the people here have had their rabbits miracuously change sex after seeing a vet. 