Can you lose your salvation?
Of course they can. Remember your opinion and my opinion on any subject in the Bible is completely irrelevant. What does the Bible say about the subject? Once you have that information then you have the tools to make an informed decision. There are thousands of articles on this subject with just as many saying yes as no. You have to make the decision.
Here are some scripture references to ponder.
For it is impossible for those who were once enlightened, and have tasted the heavenly gift, and have become partakers of the Holy Spirit, and have tasted the good word of God and the powers of the age to come, if they fall away, to renew them again to repentance, since they crucify again for themselves the Son of God, and put Him to an open shame. —Hebrews 6:4-6
For I testify to everyone who hears the words of the prophecy of this book: If anyone adds to these things, God will add to him the plagues that are written in this book; and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and from the things which are written in this book. —Revelation 22:18-19