Liv Tyler is "too sensitive" for casual relationships
The 32-year-old actress - who has a five-year-old son Milo with ex-husband Royston Langdon - has been single since splitting from the rocker in May 2008 and admits she rarely goes on dates because she worries about getting hurt.
She told Tatler magazine: "I fall in love once in a blue moon.
"I wouldn`t be capable of having a casual fling. I`m far too sensitive, and I just wouldn`t have any pleasure from it."
Liv has previously spoken about how separating from Royston made her feel physically ill.
She said: "There`s nothing worse than heartache, being lovesick. It`s like there`s a physical sickness. You go through a couple of weeks where you think, `Oh, I`m OK, I feel better,` and then suddenly, out of nowhere, it hits you again.
"The hardest part is when they leave. It also brings up a lot of issues - you might feel like a failure, or like there is something wrong with you. You can`t run away from yourself - you kind of have to just deal with it."