<human>: Can you condense the text into a few key points?

Hi reddit,

Last September I left home for university. This was my first time away from home for a long period of time, and having been raised in a home where family closeness was of high priority, I expected to become extremely homesick.

However, I have not missed my family at all. Even my sister, who is one of my closest friends, I've not missed. I feel bad about it, as the last time I visited, my mother sat down with me and told me how upset she had been as it had been a long time since I had last called or texted her. I don't like seeing her upset, so I said I would try to contact them more often. 

Even when I am home,  I no longer feel like I can tell them as much as I used to. When they do ask me questions about my education, my friends, or my new girlfriend, I tend to give short, quick answers. This also upsets them.

I don't know why I do it though. My mother seems to believe that I think she's being nosey when she asks me questions, and I know she isn't, yet she still reassures me that she's just interested in what I'm doing. I feel bad myself, I just don't open up as much as I used to.

A few nights ago, the family was talking about estranged siblings of my grandparents. My mother actually said that it wouldn't surprise her if I lost contact completely with her one day.

I'm at a loss reddit. I don't know what it is that's causing me to be so secretive and quiet with my family when I used to tell them everything. I really would like to get back to how I was, as I hate seeing my family so upset. I want to be able to talk to them again properly, so what should I do?
<bot>: Stopped talking to family a lot once I left home, found out this really upset them. I want to change, but I don't know what to change to how to change it.