Affection by my cat ?

ive homed a cat from cats protection she was found wondering a village and was attacked by many toms as they told me and could have possibly been run over by a car .. they told m that shes in between 1 - 4 years of age.. she kneads me all the time, lays on my chest and sleeps next to me or near me she follows me nea enough every where in the house i was just wondering if this meant that she is content with me . another thing i was thinking of letting her outside within the next few days as she seems to be making her own entertainment and often dazes looking out the window so i thought it would be a good thing to let her out but i want to know others opinions ???