Feeling fed up lately

My husband works full time and studies aswell, meaning he studies in the evenings when our LG goes to bed and is out studying 6am to 12.30 on weekends. He gets up at 4am every morning to study and go to work. It's really affecting me, yes we have the weekend evenings together but it's not really enough for me as he'll fall asleep at 9am most of the time. Our time was weekday evenings, but that's not possible at the moment. We have date days but that's just once per month. I feel invisible and undesired most of the time, which is affecting my self-esteem.