How do you tell your X bf of only 2 weeks, that you want to see other guys?

If you have hinted, or let him think, that getting back together is possible, then you need to be straightforward and honest. Tell him he's a nice guy, if you like, but that romantically you are through. Clearly and firmly.

If you have clearly broken up, either before or, after the conversation I described, then who you date, where or what you do, is none of his business. If you feel compelled to talk with him about it, then tell him. Yes, you are broken up and yes, part of that implies that in the future you will be dating someone else, just as you expect him to.

He won't want to hear it but if you ARE broken up, that's it! Fini!

you don't need to tell him anything. you are broken up.

I agree with Geenpunchbuggie: why do you need to tell him anything? You are broken up. It should be understood that you are free to date others (as painful as that will initially be for him).

He may want to work things out, but you have said that you just want to be friends. If you start dating other people, I'm sure he'll get the picture!

Ummm...you say "Hey, I'd like to see other people". If the man has any smarts, he'll already know by that that you have someone particular in mind.

You don't. It's your ex. Your ex will probably find someone very quickly after you go out with this new guy, anyway. So do not be worried about his feelings--and don't lie to the poor boy. "I just want to be friends". Tell him the truth, as you would a friend; "I really want to see other people."

You don't - he's your ex; you just get on with it and so will he. It may feel like picking a scab if you tell him.

He's your ex.....you don't need to tell him you're going to start dating....and by being "friends" with the ex....make sure you aren't sending him mixed signals, that's keeping him hopeful....

If you still feel the need to say something to him about it....be up front and honest....tell him that you don't want to get back with him, and you are going to start dating another guy....It is the most humane thing you can do....it will hurt, yes....but, he'll be able to get on with his life a whole lot faster, than if you beat around the bush.

just be honest with him. Poor guy. I know wot it's like to be in his position.. waiting.. thinking my ex wanted to work it out. then all of a sudden, he tells me he doesnt feel anything for me anymore and time to move on.
you have to tell him the truth. don't string him along,

He's an EX -B/F

with the emphasis on EX