Getting back in touch with a long lost friend or ex has given your self-esteem quite a boost, but be careful that you don't get swept up in the moment. If you need to slow things down, be up front about rearranging a social obligation. You have re-established a firm footing with this person, and don't fear that they will take your request as a bad sign. In fact, they'll probably be relieved that you want an honest, upfront relationship. You need some time by yourself to regroup.