Relationship seemed good till now

I’ve been with my s/o for 4 years we were always good till now. I’m currently in college for nursing and my bf thinks with school I don’t seem as interested in nursing as I do with babysitting (that’s what I do to make money while in school). Mind u my bf and I moved in together so I need to make money but he said I should work in some type of nursing job to get my feet wet. He hasn’t been himself since early June we talked about it and it’s not getting better in fact I’m not staying at the house and we’re taking some time to ourselves do you think this could be the end or any advice on how to fix this. I personally think he’s over worked and making this a bigger deal then what it needs to be.