People around not supportive of my work ethic

Hi all,

I'm someone that works a lot (first year at an MBB), and to be honest kind of enjoys it. I like being good at what I do, getting better at my job, and generally excelling in things. This strategy has worked well for me throughout life (went from a poor family to an amazing college, now to a good job, etc).  However, as I move into the 'real world', I'm finding  that many of those around me don't really support my work ethic. I have a partner, who is constantly getting upset when I can't have dinner together, or when I want to work on the weekend. Recently I stayed at a friend's place while I was in between apartments, and I was studying for the GMAT most of the time. He commented that I shouldn't study so hard and I should have more fun, go out more for dinner with him, etc. 

I remember previously in my life when I lived with my family during high school, I faced a similar situation where I would skip family events to work and my family would get a little upset.

Note : I'm not upset that I spend so much of my time working, so I'm not really looking to 'work less'. I like it, and doing well in life gives me a lot of satisfaction. However, I find it hard to cope with the 'disapproval' of those around me, or when I disappoint people because I'm working and can't spend time together.
 

How would you guys handle these situations? Can I do anything better?