The Bottom Line
Another person is influencing your future more than you realize. Set them straight.

In Detail
Sharing your life with someone is a choice -- friends and partners in your past have always provided you with the support you need, but right now someone could be morphing from a supporter into a controller. Observe your social calendar -- who's been making all the rules? Before things get out of hand, start flexing your own muscle and making your own choices. If you get some attitude about it, then slowly phase this person out of your plans. Life is too short not to live your own.