<human>: Can you give me the gist of the text in a nutshell?

First, my boyfriend and I are great together and are in love but for me, this is a major issue. 

When I ask him why he wasn't mentioned that aspect of my life, yet talks about me in detail otherwise, he said that he "doesn't know how to tell them" and that he "doesn't want to hear that he's in over his head." I told him to just say it and he is making a much larger issue than it needs to be. 

It hurts that when I talked to his mother on the phone, I had to be careful what I said so I did not accidently talk about my son. I explained that this upsets me because I shouldn't have to hide who I am or be deceitful.

I haven't met his family in person, or any of his friends, despite the fact that he lives with them while attending college. I only want to be included in his life and it feels like he's ashamed of who I am, even though he denies it.

We are going on a vacation in about 10 days with his brother and this is the first time I will be meeting him. I inquired if he told his brother yet, which he did not, and requested he tell his brother before we go away. I'm worried because I'm not sure he ever will tell them or if he is as serious about me as he claims to be.

I don't want to break up or give an ultimatum, but I'm not sure what to do.
<bot>: Boyfriend won't be honest with family about me, not sure if he is truly committed to me, and it makes me sad.