You are the fun loving type and you want to enjoy life which means you will never stick to one guy for long .Be true to yourself and without giving false hopes to your guy friend tell him the truth and break up .By now he would have realized what type of a girl you are.Two weeks more than enough for an intelligent guy to form an opinion about his new found partner He would have realized that you are the type who enjoy flirting .So he will respect your decision and leave you . Make up your mind take action without delaying.

You need to figure out what is at the heart of al,l of this. Is it that this is quite new, so you feel a bit uncertain (which is reasonable), or whether actually you'd rather be out meeting other people than being with your current partner (in which case, this isn't the relationship for you). But being in a relationship that might only last a few months anyway isn't the same as committing to one person and settling down. I would suggest talking to him, explaining that this is all quite new and you feel a bit uncertain sometimes, and that you just want to see how it goes rather than see this as something permanent already. I can't imagine any reasonable person would be upset than that - after all, it would be strange if after a couple of weeks he's already thinking this is a forever thing! And anyone who isn't reasonable about this isn't really the sort of person you want to be spending too much time with, I would think.

SPEAK ... before you make anything complicate and confusing its much much better to SPEAK & TELL him what you Feel .. Despite the fact that a past relationship may have ended for very good reasons, memory tends to soften the harsh edges of those difficulties. Your ex starts to seem pretty desirable—and you can’t help but focus on your current partner’s flaws. There are several good reasons for becoming stuck on your ex:

One, that person isn’t around anymore. Those small things that bother you about your current partner, like the tendency to leave dirty glasses around the house, are apparent to you on a daily basis. You don’t remember that your ex engaged in the same behavior, or (probably) worse. Without the memory of your former partner's negative behaviors in your current consciousness, they dwindle.

Another reason to romanticize your ex relates to how many reminders you have of that former relationship. Perhaps it’s the couch you still own or the crystal vase you and your partner received from a close relative. Little pieces of your ex are still physically with you, and with those pieces go associated memories. You may have spent hours on that couch involved in arguments with your ex, but perhaps an equivalent amount of time sharing a pleasant conversation or a romantic movie. Perhaps you received that vase as a wedding gift, during a period in your life when you were happy and optimistic about the future.Further, when people think about the past, they often do so in a way that frames themselves in a positive light and as active agents in shaping that past. It may not be the ex specifically that you long for, but the way you were with that person, and how that relationship made you feel about yourself. Memory has a way of shaving off the rough edges of past experiences, especially as time goes on. You forget the fights (and perhaps your role in provoking them) but recall how the relationship made you feel like a valued and loved human being.