Hi. i want some help! i had a grilfriend we been to gether about 5 monthes. at the seam time she was with she?

at the seam time she was with me she had with other too. now we not together about 4 months. i dont know really what happend to me. after that i never feel like to have even not thinking about that.even i want to have my pines not really want to.plz if you have something help me. i know it is just stupet Qu bout it is reall to me!!