After talking with Michelle (who plays Sirius), we've determined this:
- Sirius doesn't realise that he may like Remus
- Remus is fully aware that he likes Sirius, and he has been since before The Prank, which took place in 6th year. He's tried to get over Sirius, but to no avail.
- He had a short fling with a Muggle over the summer before 6th year, but it wasn't serious, and he was really vague with the details to his mates.
- Remus came out to his friends (he's about a 5.5 on the Kinsey Scale -- "Girls are icky") in 5th year.
- He realised he was probably gay after trying to go out with a girl in 5th year. When she kissed him, he was like "this is gross", and realised that it wasn't her fault; because, objectively, she was quite pretty. She just wasn't a bloke.
I apologise for the backwards chronology.
Cheers!
♥