i know exactly how you feel, i'm currently pregnant with my second (only 10 weeks) but already i feel like i can't stand my boyf being near me, i was the same with the last one tho, i suppose thats where my situation differs. I just look at him and i have a sort of a nothing feeling i don't know if i love him or hate him i just don't want to be around him
When i felt like this last time, as soon as i'd had my little one, all my feelings came back and i was as in love with him as ever, but i know how you feel, especially when you say he seems to be loving a supportive, you can't seem to see why you would pick this moment to fall out of love!!
my advice would be to wait and see how you feel in a couple of months, this could all be a nasty trick your hormones are playing on you. When you feelings are all over the place it's never a good time to make life changing decisions. I hope this helps good luck. Luv Vic + bump10w