Resolved Question

I have caught my boyfriend several times on other networking sites talking and flirting with other girls..it started small and finally let him to meeting someone off here and hooking up with them. which i of course found out not even 2 days later by a random text message of his. it's my fault for staying but i do love him. he says he can change and doesnt want anyone but me...but it's like there is this other side to him...this person everyone knows and loves,and then the one when he gets online...that no body knows about. i want to trust him again. weve been together 5 years and i dont want to lose what we have, but it is very hard to get the trust and security back. is there such thing as being addicted to the internet? and talking to so many different girls for attention. we are both 25, i dont understand why he does this....its a sick chain that i dont know if it can ever be broken?

Yes, there's defientely such thing as being addicted to the internet and it's certainly easy to lose your true identity when your in cyber space. It's far easier to be wittier and seem more appealing when your not talking to someone face to face too.
I can understand why you want to trust him again. 5 years is a long time to be in a relationship and you may feel slightly lost if you went back into the dating world after so long. But you need to ask youself if you can believe what he says. Do YOU think he can change, and can you see your relationship going back to the way they were before you found this random text message? At the end of the day this is your decision but relationships are built on trust and honesty and if you don't have that then maybe its time for you to move on and find someone who truly deserves you... :)