Will she get bored after 1 year?

hi guys, i am martin from liverpool...my girlfriend is a movie star and has a lot of boy-friend....sometimes i feel jealous but i tried to not be jealous...the main question is Will she get bored with me ?? i think if she does, she doesn't really love me....she just play around with me....if she really loves me she would never get bored i think.....and one more ques: What kind of attention should i give to her in school.thanks...please answer in details ok....i really nedd your help guys....thanks