Should I tell her I love her or not?

Hi First off I'll start by saying we are both adults.

I am pretty sure I am in love with this beautiful woman. I think about her day and night, when I see her even a simple "hi hows it going" from her makes me happy. If she was to ever come to any harm I would rather it was me than her, I think she is the most beautiful person in the world. I have tried dating other people + Having sex, but it just doesnt work I am still thinking about this one lady. Being with her for even a minute and hearing her voice and seeing her smile makes me happy.

Theres more reasons which I could say why I love her, but thats enough.

Anyway the thing here is, I have asked her out earlier this year to dinner (around July-ish) and she said no. Fair Enough.

I know that this is extremely selfish of me, but it's eating me up inside and I have got to tell her. I dont want to lose her friendship though. Im scared that if I tell her I will lose her friendship. I am pretty sure she doesn't like me back, but right now I dont want to tell her I love her to date her, I want to tell her because I think its unfair if im not completely honest.

What should I do and why?

Thanks you for all the help :)

You are not in a relationship with this woman so my advice is don't tell her - it will only freak her out

She will get scared and will disappear from your life.

Perhaps you need to just hang out with her in a manner that doesn't seem so "date-like"