<human>: We have been together for 2 and a half years as of the 5th of June.  I want to propose to her sometime in November or December.  My price range for the ring is not much of an issue since I have a fair amount saved up from the last few years.

I've never bought her any sort of jewelery before because she really doesn't wear it or anything, so bringing her to a jewelery shop will definitely send some signals her way and I don't want her suspecting anything.

So I'm asking for the people who have been in a similar situation such as myself, how did you pull it off without your SO knowing?  Or did you just accept that they knew you were planning on proposing?

Can you summarize the given text in a few sentences?
<bot>: Want to propose to my gf, not sure of her ring size and unsure of how to figure it out without sending off any signals.