I have advice. Rather than trying to play rebound by meeting another random person while you're still emotionally hurting, why not use this time to reflect on your priorities in life?
Rushing off to meet someone else is just a way of avoiding how you're feeling, rather than facing it and healing from it. So you will still build up bitterness because the root issues are being swept under the rug, where they will only fester and grow and you will bring that baggage with you into every future relationship while trying to convince yourself everything is ok. And when that day comes when you have to acknowledge things Aren't ok, it will be 10x's worse to deal with because not only will those feelings have grown, but all the other times you've done the same thing will stack. So you'll have negative after negative issue building up and growing.
And, while i don't know you, so this may be wrong, but it sounds to me as if you are finding too much comfort and possibly self worth in relationships.
Being sad isn't a bad thing, when it's from an appropriate reason. Sadness is not something we are meant to ignore. It is a sign to us that we are hurting inside and we need to heal. Ignoring that feeling and trying to cover it up with new relationships or whatever isn't healing. It's hiding.
And talking to an ex that is that eager to come knock down your door without giving you any time to recover sends up a red flag about him.
In November the woman i was planning on getting engaged to dumped me. I have spent since then trying to win her back and she has done some pretty hurtful things during that time. But one thing i know is getting into another relationship now would be a horrible idea. Or even just talking to people with a romantic notion in mind. Because i can't be sure if i'm truly attracted to them, or i just like that they are a distraction. And either way i know i am not in any state to try to get into anything with anyone.
So my advice to you. Skip that dating sites, which are mostly full of horny dogs, trust me. My ex has spent since Nov on them and has met one bad choice after another. And i get to hear about many of them, bleh.
Also skip talking to your ex, who is only going to tempt you to make a wrong choice, and who is already showing himself to be a wrong kind of person. Skip dating at all for a while. Focus on God and get healed and get emotionally healthy enough that you don't feel you have to hide from your feelings and rush into a relationship or rush into meeting someone as a cure for boredom or loneliness. Because if you enter into any relationship without the right mindset it will fail. Period. And that will lead to you doing the same thing again. And again. And you will find yourself in a long line of heartache that you could have prevented.