To “abide” means to “remain” or to “dwell” to “continue” or to “endure.” When we talk about abiding in this sense of persevering or of remaining in Christ (John 15:4), we are not talking about whether or not you can lose your salvation. We are talking about perseverance from our perspective.
“Abiding in Christ” has to do with choosing communion with Christ over other things that we might pursue, even good things. Are you choosing to live your life in a sphere where Christ is what is important, where you are influenced by Christ and by the things of Christ? Are you choosing to live in close communion with Christ? Or are you choosing to live under the influence of someone or something else or seeking things other than Christ?