You see, you're focusing on trying to get her in the loving mood, which is what you want. But you should focus on trying to help her relieve her stress, which is what she needs.
I'm not a doctor, so don't know any true remedies, but try to think of what could de-stress your lives. It sounds like she's in that crazy, 'i must get on, I must get on' mode where she can't switch off to relax, not even for a minute.
Does she sleep/eat well?
Does she get wind down time?
You need to look at the fundamental basics of how to make life less pressured before anything will change. Of course, it may not be something obvious that is causing the stress, so time management won't fix it if the cause is something different. (e.g. my daughter has special needs. no amount of free time will stop me stressing over that, only a magic cure will, so there will always be a certain amount of stress in my life)
Look at ways to relieve stress/pressure in your lives, but also try to talk to her about why she is stressed and what can be done about that, either to eradicate it or learn how to manage it.
Maybe it is something that talking to an outside person would help? This could be a chat with friends/family, or a professional. Be careful, though. Sometimes I start talking about my daughter and I just can't stop crying, so it can be pretty emotional.