User blog comment:IamJakuhoRaikoben/Chapter 418: Challenger, Review./@comment-4999650-20150202192928/@comment-7418318-20150202193517

Didn't Lucy already say so during the chapter. I interpreted her words meaning that a part of her wanted to stay (and later get back into) contact with the others, but a part of her was afraid. Whether she was afraid to rip open wounds that hadn't yet fully healed or afraid of forging bonds because they could end up being severed and hurt her again is anyone's guess.