<human>: I will try to make this as short as possible, as I'm sure there are others on this subreddit with more intense situations, but  some outsider advice on this matter would really really help me out.

I have been dating this girl for about 5 months, and its been pretty official I suppose. However, I just graduated from college and at my new job (I work in a lab) requires a lot of hours of work (M-F, 8-5) with over an hour+ of a commute both ways. In addition to this, I have the opportunity to put in more hours at home on some additional research which will probably help me further when applying to graduate school- my number #1 goal that is before anything else. My social life is also important to me, as well playing music with my friends, one of my few outlets to destress. however, spending time with her, although nice, cuts into the very little time I have as well as my miniscule expenses.  I see her maybe once or twice a week, which I don't think will get any more frequent as time goes on, and I don't want to continue this and feel like I'm still leading her on or something. She is really a nice girl and I like her, but how do I approach this situation and tell her how I feel and not end up sounding like a total douche? I feel at the time it was just a casual relationship, and I don't want it to get more emotionally intense if I know I can't fully commit to it and hurt her feelings.

Can you give me the gist of the text in a nutshell?
<bot>: feel too busy/ overwhelmed to juggle work/social life/ and staying in a relationship so how do I relay this to a girl I'm dating.