Should I confess to her?

I have known her for the last 6 yrs. For the last 4 yrs she has been my bestfriend. We have shared things with each other that only the both of us know, not even our family knows about it. Today she asked me why I had been ignoring her sent reels and messages on insta. I never do that, not just with her but not with any friend of mine. I made up a lie and told her that I just don't feel liking talking to her and lord she was hurt. I am going to be 20 in the next few months. Never ever had a gf and frankly speaking only had 3 crushes including her till now. You know how we became friends, she helped me get over the girl I had a crush on before her. I feel like an ass since I told her that, I tried telling her that I have been this way with everyone lately and she accepted it but I know she knows that it is not true. I am just worried what implication a confession will have on our friendship. Please take me back to the time where I did not have a crush on her, when she was a bro. She will say no and that will break me and this time I don't even have her to help me.

So should I tell her? Should I kill this friendship for my own peace of mind?