<human>: So basically I'm 17 and have a few younger brothers. This 19F, named X, is my first cousin - the youngest of several. It's important to establish that this is non-romantic here. My first cousins live on the other side of the world, but I love them a lot (familiarly). My second cousins live about half an hour from me but are quite a bit older (mid 20s+). As such, it's difficult for me to talk to them when I see them.

As X is close to my age, it is considerably easier for me to talk to her. I enjoy doing so more than talking to anyone else in my family that I can think of - my brothers aren't mature enough to have a genuine conversation with and my second cousins (I feel) are too old for me to properly relate - there's a noticeable age disparity, and it shows in conversation. 

I see X maybe once or twice a month, when she comes around for a day or two. We talk etc. When she leaves, I can't stop thinking about it for a while. This while varies - sometimes a day or two, other times at least a week. I don't really know what this means. I don't think the problem is my conversational ability - I get along with my friends just fine. I find myself consciously thinking of what I'm thinking often, then think back to her, due to the nature of this 'problem?' When I talk to X, I don't think about any of this stuff at all.

I think an important thing to mention is I'd have liked to have spent more time with my first cousins - I haven't seen 2 of them for about 6 years and barely remember them. This probably has an effect on this situation.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Don't have anybody at home to talk to (ie a genuine conversation), when someone I can talk to comes around I can't stop thinking of them for a while. What does this mean/what can I do?