From what I can see your sitch is looking good. Your interactions are positive, no OM, W wants to spend time with you and she is looking a MC. She's even helping you buy underwear!!
You will find that time feels like it's standing still. I can look back two weeks on the calendar and it feels like months ago. The reason I mention this is because I don't think your letter was needed, it was too soon and was a panic move. It didn't say much more than the 1.5 hour R conversation you had 6 days ago. She wanted to have that conversation. You really have no expectations? It appears like you were stating your position again (so she really knows for sure) but it's also pressure on her. If she is having second thoughts it could make her feel guilty and if she isn't it can make you look like a back up plan or weak. She knows where you stand, stop telling her.
If you want to send a letter tell us and wait for a response and BUMP your thread until someone does help you.
I than that it's going well. GAL will help you massively. It will take you mind off the sitch allowing it time to do things that you can only damage by being upset or rushing things. If GAL is working out how to successfully buy your own underwear then do that. It takes up your time, you look independent and it's a 180 as daft as it sounds.
Now go and buy some socks.
M36 W31 S4 S2 T5 M4 BD Jan12 S July12 Recon Sep12-Nov12 ILBINILWY Jan13 OM x 2 in 2013 W wants R July 13 I start D. Jan 14. Meet GF Nov 13 Have I changed enough? Jul 14
