It looks like this is a vine. Although I have no experience with this plant, I believe that most plants in the pea family can be invasive due to re-seeding. If you want to take the time to remove the spent flowers, you shouldn't have a problem. I get partridge peas ALL over in my garden. The flowers are similar in style to your plant, except yellow. The seeds from the spent flowers pop and then shoot all over the place. The following year I have plants everywhere and I just pull them out where I don't want them.
Your call ~ I think it is a pretty plant and wish I could find one around here.