i dont really like walking with other people! lol. its strange hey! id prefer to go at my own pace and not talk to people and not have to keep up with other people or have them keep up with me. but some poeple really like walking groups. you could probably find one in your area. check your community centres.
i find there are days where i cant get motivated but i know once i get out there and start i feel better for it. try it. put your walking shoes on, grab your mp3 player- or buy one or borrow one or something and get going. or maybe you can drive some where scenic and walk once you get there if its too far. like the beach, lake, walking tracks etc.