Jennifer Aniston may be head over heels for Jim Curtis now, but it wasn't always the case. The Friends star was incredibly "cautious" about getting entangled with the hypnotist. A source told People on Friday that the couple spent "months chatting and getting to know each other" at the start of the year - and Jen was the holdout when it came to turning things romantic: "Jen really valued their friendship in the beginning of the year. When it all took a turn to something more romantic, she was cautious at first. Now, she's excited that she just went for it.