Based upon John 14:21, love for Jesus is not merely a belief in Him: "He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him." (John 14:21, KJV
Paul in Romans 10:9 uses the aorist tense to signify salvation is by one time events: "if ever (ean) you confess (aorist active subjunctive) by your mouth that Jesus is Lord and [if] you [ever] believe (aorist active subjunctive) that God raised Him from the dead, you shall be saved." (This is my literal word-for-word translation.) Thus, Paul is using the Greek aorist verb tense. He means you are saved if you ever once confess and believe. No continuity is implied in verse nine.