I'm tired but not tired tired?

I'm currently 25+5, and whilst I usually pretty active with work, family, friends etc I've not really suffered with tiredness but being on lockdown and not working I feel tired but can't sleep. It's more like a lack of energy/motivation. I feel bad that my partner is currently working 12 hour plus days and I just want to lie down and do nothing.

Is anyone else feeling this way?