Part of him thought he should not hit send. He said what he said and it was true, whether his feelings were unwelcome to Spock or not.
On the other hand, if Spock thought his declaration was something they could not get past, he might ask for a transfer, or worse, go through with his idea to leave Starfleet and go to New Vulcan.
Ambassador Spock’s death had been hard on Spock in a time he’d already felt torn and under the stress of contributing directly to the Vulcan cause.
But was Jim being selfish in keeping him here?