It is also possible that your boyfriend is using safety concerns as an excuse because he simply objects to you leaving him for 2 months. I don't know what your relationship is, or why he isn't a backpacker when clearly you are, but maybe this trip makes him feel vulnerable on some level. Parents are always going to worry because that is the definition of parenting. And friends would worry if they don't have the practical experience to draw from.

Leave a detailed trip plan and then update it periodically along your route. Hone your situational awareness skills, relax and enjoy your trip.

MNS