What do you tink I should do?

Ok, me and my boyfriend met on the internet a year ago, we lived in two different states, after he told me that he loved me after 8 months, I told him that we need to make plans to be together, cause this long distance thing is becoming old, and if he loved me he would make plans with me. He moved to cali with me and have been here for 2 months now. My concern is, he has been on the internet being to friendly with other females, and I think it's wrong, he says that he moved out here for us and that he is not doing anything. jeopordize our relationship, and that he goes no ware and see's no one, he is always home and that I should look at that. I still do not like it and I do not know what to do? Help