When someone disconnects from a relationship it usually means they’re not able or interested to continue in the relationship.
If after six months, your girlfriend is disconnecting, the first thing you can do is ask her if she’s noticed she’s disconnecting. I know this sounds too obvious, but sometimes people don’t realize they’re disconnecting because their attention is on something else. She may have some stress in her life that you don’t know about. She may not even realize she’s disconnecting, and a simple bump from you in the form of a question asking her if she notices, may be all it takes to put her back on track.
If she does know she’s disconnecting and is doing it purposefully, it would be nice if she could tell you why. There may be a problem and a good reason, and it may be something that the two of you can work on. But this assumes she has the tools to work on a problem. It doesn’t hurt, however, to ask. In fact, I’d advise it.
And lastly, she may just be breaking up with you or is no longer interested in you and this is her way of showing you she’s moving on. If that’s the case, then it’s okay to be hurt and disappointed. It’s not okay to wallow in it. Check out my book, Date Out of Your League, by clicking on the link at the top of the page that says Dating Advice Books, then scroll down and order my book. It will help you get out there and get dating again and to find someone who’s fabulous and who wants you!