No, you can't marry
(Threads will start getting spammed asking for this. Bethesda will eventually give up and allow it/add it/fix it, like they did for Lydia.)
The only way for any Khajiit marriage option is through a mod that broke with a recent patch (I have no clue if the author intends to return to it), and I'm not sure if there even is such a mod for the Bosmer.
If they left out two entire races without a word about fixing that I highly doubt they'd make changes for a single character.