He is your husband and you are his wife. That relationship will exist beyond your daughter (and future children) growing up and moving out. First, I must say that I like the fact that he tells you how he feels. That is a good sign of a healthy relationship. He is willing to communicate instead of acting on his unspoken emotions. So, tell him you appreciate his honesty, that you've been thinking about what he said about your relationship, and ask him what he would like in your relationship. Admit that you want another child, but you want a happy relationship more. You're willing to work on the relationship if he is. Be open, because if you suddenly change your attitude and end up pregnant, he's going to feel used and resentful of another child. Ask him what exactly he would like. If he says, more time with you, then ask him, how that can be accomplished when the two of you are on different time zones? No ideas? Here are a few suggestions:
Make the time to spend together. I know--two different time zones. But, the times must overlap at some point. Even if it's a date in the dining room before he goes to work and your daughter is in bed. Remember that the two of you went from being total strangers to husband and wife. You probably went on a few dates, but I bet you married because you both talked all the time about everything (not parenting), which led to marriage--you shared your lives then and wanted to do so forever. So, rediscover each other. You probably will have to initiate it only because you are the one seeking to make the change. He might catch on, if he likes it, and reciprocate and build on it. Use the telephone, e-mail, love notes, etc. to reconnect. You can leave notes in his car that he'll find on his way to work. You can e-mail him, something simple, "just thinking of you." You can call him once in a while in the office, on his break (if the breaks coincide). If not, and he gets home after you've left, leave him a note on the refrigerator or on the bed pillow. Also, pray that the two of you get off different time zones. If that's been happening for 6 years, it's no wonder he feels like roommates. You can't connect emotionally to a person who simply comes and goes; and he can't connect physically to someone who is disconnected emotionally. I'm sure that kills the love life. Plus, you've probably picked up the majority of the household and parenting responsibility as a result. Try to leave some tasks for him to do, like grocery shopping, bill paying, housecleaing, if you have all homework, after-school activities, field trip, dr. appts., cooking, and other daytime duties to do. You both work FT, but you might be doing too much at home, which is further draining.
If you two have different work shifts but similar leave schedules, try to find a day when the two of you can take some time to be alone and your daughter is in school and renew your friendship. Get some help. Do you have relatives nearby you can trust or does your daughter have school friends she can visit for about two hours so the two of you can spend some time alone? If not, have you thought about enrolling her in something like The Little Gym or My Gym, which offers parents' night out events? No free time? If your husband comes home at 5 am., and you've got to get ready for work by 7, have an impromptu breakfast in bed date. The same effort it took to be friends prior to marriage exists after marriage. You both probably snuck in every bit of free time you could get together then.
Would suggest not bringing another child into your relationship until you build back the intimacy. Being pregnant and caring for an infant will take more time and energy away from your marriage now. You don't want your children being resented, and you don't want to use your husband as a donor.
Love is an action word that requires effort--not just the emotions we tend to think. Once you've rebuilt the intimacy, both of you will be able to welcome another child with open arms.