Have you checked out the "low sex marriage" area of these boards? You might be able to get more insight on the sex issue there. I hesitate to say anything one way or the other about pursuing your H sexually at this time.
I'd still go on your trip. Focus on having some fun for you. No one will say that it's easy, but you CAN do it. Also, don't beat yourself up when you do feel down. Those feelings are normal. I indulge myself in them now and again and then move on. As you move forward, your attitude will become increasingly positive.
You're going to have to carry the R for a while. If you're H is OK with doing things with you, keep it up.
It'll get better.
BD
My latest
Me: 36 W: 35 2 D: 9 and 5 T: 16 years M: 12 10/4/06: Bomb 10/5/06: Ended A 4/22/07: ILYBNILWY