I think its best when you put your heart to the flame and just tell her you love her without knowing what will happen. I broke up about a month or so ago and send her an email every now and then when I feel like it. I feel much better after and then just go about my business.
To me, it seems logical to have a feeling in your heart that needs to have something done with it. I look at my options, I ignore it, or do something with it. Since I regard directing "her" feeling as "hers", I simply let her know.
I'm never one to really do this, but I happened to have her email password and said, "oh what the heck, one peep to see if she even reads my emails won't hurt"...
I checked the email and found out she had created a filter that sent them straight to the Deleted bin. This really gave me a wake up call because to some extent I was hoping we could patch it up and continue "again". The wake up call sort of left me there feeling like it was serious so I respected it.
A week later, I felt like expressing myself with a simple "thinking of you" in the subject line... (from a different email that is) and felt good with that.
I find it logical to take actions that purge or move the emotional burns or glows we feel develop in our chest. If you feel it, do something with it.