Well, what I'm hearing you say is that you believe you have feelings for this guy still, and you're compartmentalizing them in efforts to maintain regularity in your day-to-day life. And, you're afraid that, if you "break-down" that wall, that shell you've built around yourself (around your heart), you'll have all those feelings come "flooding back." The hardest part about being slighted or done wrong is the pride factor. It's not only... just plain rude, it's demeaning to think, "Wow, someone I cared about this much hurt me 'this' bad." In this case, we begin to second guess ourselves, but that doesn't necessarily mean to second guess your feelings, deep down. (Usually, they're so far "deep down" because that's where we buried them after said break up... right?) :)

And, while you can control who you answer the phone to, and you can control what text messages you respond to, and you can control the possibility of going through the motions, dating someone else... the one thing you cannot necessarily control: your feelings. And, realistically, if you even have the slightest feeling(s) remaining for your ex, you’re only discounting everyone involved (the ex who seems to still care, yourself for denying your feelings, AND this new guy, in that he probably doesn't know you feel this way about your ex). You owe it to yourself to find out what this means, in a controlled, reliable way/environment.

So, in the natural theme of intrinsic change (listen to your inner voice) and personal growth... this is my "official" advice: I say, wait 2 days (to convey that you're "breezy") and text message your ex... ask him to meet you for coffee/ice cream/whatever would be a normal, relaxed, positive atmosphere for you (nowhere dark or with drinks; you may send the wrong signal or feel slighted if you can't be well understood in a bar/drinking atmosphere). And, say something short and sweet like, "hey, I’ve been somewhat busy with work, and thinking a lot... wanna meet for coffee or something on Saturday am/pm?" If you don't get a message back, that means the time slot you've proposed (ideally, Saturday during the day-- you won't be rushed and you'll see how he's realistically been committing his free time) is full. Then... you have your answer (translation: he still cares about you, nobody quits anything cold turkey (not even men), but that time slot is full, and he's not willing to move anything around for your proposed date) -- note: this translation also applies if he says he's busy that day, and it's anything other than a predictable work commitment... OR, he'll message you back, and you'll go have coffee. Either way, the ball is in your court being that you've set the plans, you've stepped up to the communication plate, he knows it's important enough for YOU to take the time out of your day, and/but you're in public (so he knows you don't intend to do anything other than talk, i.e. cry, yell, be romantically physical, etc). Then, put on your favorite jeans/outfit (for confidence), and go meet him... ask something like three questions not related to the situation at hand (and not pertaining to his new girl) to get him mentally "warmed up" and sort of like conversational olive branches. Then, ask him what he's "been thinking... you know, about us." (As open ended as possible). And, let him talk. If you what you hear doesn't validate whatever he did that caused you to come to this site in the first place, revert back to the old faithful reasoning," well, being that you're seeing someone else now, as am I, I don't know that it's appropriate for us to keep communicating with subtext that we still have feelings for each other." (old, faithful = he can't argue with that). Then, leave.

If you do hear what you want to, I agree with "aliciak," take it reeeeeeally slow. Maybe you can't control the fact that you do have feelings for him, but you can control how much (if at all) you capitalize on them (hence, you CAN control if you let those feelings put you in a situation with emotional vulnerability). Otherwise, trust me, you can't ever REALLY move on until you've put to rest the pleading questions that your heart asks your mind every, single time his phone number shows up on your phone. You owe yourself that; closure is but a catalyst with regards to your past, present, and future chemistry. Good luck!

"i'm afraid that by talking to him all of my feelings for him are going to come rushing back, ruining the 2 weeks of progress i've made."

If you do have feelings though, you should probably deal with them sooner rather than later. You won't want to be in a relationship with someone else and then have to revisit the feelings and have it really ruin something. I think it's important to truly be able to move on, and that can mean dipping into the past with your ex.

Sometimes people do deserve 2nd chances...I'm not sure what your situation is, and that's up to you do decide, but if you still care for him, then there's "something" there. If he wants to get back together, what about starting slowly...don't see each other all the time, maybe even discuss dating other people at the same time.