Ok what to do? Advice would be great!?

That's been almost 4 mos. ago & you haven't heard anything from him since then?! I may be dumb, but I don't understand why the "big encounter" at Walmart was enuf to make you actually break up! I don't see or understand the whole reasoning behind it all. I wouldn't tell him you're dating tho that's a lie & I don't particularly agree with lying or see the purpose of it to begin with. I would rather contact him & be honest with him as that's my mode of operation "honesty". Let him know how much you really do miss him, you're sorry for the "encounter" that upset him so badly. Ask him if you just can't put it all behind you & start a whole new beginning. IF he honestly did like you as you said he did, see if he's willing to forgive & forget. Instead be honest & let him know you miss him being a big part of your life & would he give it serious tho't to getting back together again. I fell you'll get your answer one way or another regardless if you like it or not...I DO wish you the best...:)