I thought you might be having some of those "expectations" crop up in your thoughts about his work trips. It's really does get old when they are living under the same roof and yet, the person you knew is no longer in the "shall of a man" that comes and goes from your home.
Your h knows that you love him and he also knows that you are right where he left you. The time away is good for the both of you because it does give you time to focus on you and also helps him to focus on his work and also on himself w/o any additional distractions.
It's okay to have funky days. We all have been there, done that. MLC is a beast and it's not for the faint of heart. It's a marathon, not a sprint. So, buckle up and get ready for a bumpy ride...but I have a feeling you are going to be a strong and independent rider on this particular ride.
BTW, have you given any thought to moving over to the MLC Forum? Much of what is going on in your situation happens every day over there and there are plenty of wonderful people there too, who will support you, provide you advice and be there for you.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
