no, he will not channel, he is far to old. read this
http://www.steelypips.org/wotfaq/2_nondark/2.2_rest-chars/2.2.1_thom-channel.html
That link will disprove any thought of Thom channeling.
And yes, I do believe they will be lovers (Thom and Moiraine). well this is another link to the same site, it is very resourceful...
http://www.steelypips.org/wotfaq/2_nondark/2.5_lurv/2.5.3_thom-moir.html