Girls whine all the time, well my three girls who live with boys do, the spraying in the face is very normal. I wouldn't imagine this behaviour will ever stop. My boys and their girlsfriends have been together for a year and the boys still try to hump, my girls spay them with urine, to tell them to go away. The boys chase more ongoing saga. rolleyes
Yet in the evening I often see them cuddling up, lying close or grooming one another. One of my boys, dotes on his partner more them some other piggies. If I so much as take her out the cage he gets so upset looking for her!
I have a boy and girl pair that didn't work believe me its farely obvious when it goes wrong. If they are going together for hours on end, I would say chances are they will be fine. MY female attacked her male and they ended up scraping, if you aren't witnessing this behaviour I would say all will be fine, happens very quickly.
Please do get on with it, your not doing them any favours introducing and reintroducing, they won't know if they are coming or going. Good luck for friday!
Ps. he is well over 4 weeks since his neuter? Otherwise don't put them together atall.