Do I keep him or Dump HIM?

My boyfriend and I dated for almost a year in highshool. He broke up with me for many different reasons and i understand why. I was very immature, he was my boyfriend and i didn't know how to act in a mature relationship. needless to say it wasn't healthy. we took a break for a year and a half and started dating again. we've been together for over a year and things have been absolutely perfect. I love him with all my heart and he is the one for me.... however.... in his phone he has images of others girls that are naked. Most of these images are from when we weren't dating so it doesn't matter. But there are some that are recent.... as in TWO days ago. Other things have happened to as well... girls are always texting him and i just get a feeling. Ive had to ask him to not talk to two girls cause they clearly crossed the link with I'm saying "oh lets have sex... i miss you... i love oyu... call me... thanks for calling me last night" and recently he was face booking a girl and asked her if she wanted to talk on the phone. the only reason i know this is because this "girl" and i share a mutual friend. our mutual friend has been my friend since we were little. this girl and the mutual friend just met in there bio class this year and were lab partners. anyways... the bottom line is... he is perfect in every other way.... except the reoccurring naked pictures and too friendly talk with girls. do i keep him or dump him? what should i do?