…your mouth waters at the sight of a truck full of hay.
...your boyfriend complains that you love your horse more than you love him and you say: "And your point is..?"
..your friends no longer ask to get together after school/work or on a weekend because they know you'll say, "I can't, I have to ride."
...you say "whoa" to the dog.
...you show up for an appointment in your city clothes and when you get there people reach across the table to pick alfalfa out of your hair.
...someone does something nice for you and you pat them on the neck and say 'good boy'.