Abide (meinate). Constative first aorist active imperative of menō, summing up the whole.
In my love (en tēi agapēi tēi emēi). Subjunctive possessive pronoun, “in the love that I have for you.” Our love for Christ is the result of Christ’s love for us and is grounded at bottom in the Father’s love for the world (Joh 3:16). John has emos 37 times and always in the words of Jesus (Bernard). But he uses mou also (Joh 15:10).