Sorry if I hit a nerve. Although no one said it it did seem strongly implied that there was some kind of connection to be sought between the fact of the ring and the possibility of a marriage. If I misinterpreted that and was offensive with my opinions, I apologize!

I think in that case then giving the ring to him with the assumption that if and when he decides marriage is for him, and he wants to marry you, then he'll use it to propose, and if you break up he'll give it back....is not a really good idea.

Just wear and enjoy the ring! And enjoy the BF! and mentally separate the two far far apart!

So, there I impose my opinion again, take it or leave it. I do think it's really cool that you won a $2K diamond ring though, wow.
All the best,
Adinva

Adinva 51, S20, S18
M24 total
6/15/11-12/1/12 From IDLY to H moving out
9/15/15-3/7/17 From negotiating SA to final D at age 50
5/8/17-now: New relationship with an old friend
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Happiness is a warm puppy.