Seeing ex at party tonight, help!

[StellarLights]

Ok so tonight I will be seeing my ex at a friends 21st, things have been rocky between us since the break up- we decided that we were going to see how things planned out as regards to getting back together in the future (he says that he still loves me and always will) however it's been over a week since then and I've been avoiding him because I didn't want anymore drama. This stems from a phonecall that we had where things got a little heated and I said that I'd had enough, he said "I'll see you tomorrow" and I said "I'll see you around."
Before I started avoiding him he reassured me that he wouldn't be flirting with other girls etc. however I've not spoke to him since then.

He said to a friend that he thought that I was pissed off at him but my friend said that I was just avoiding drama.

I guess I'm just worried that everything will have changed since I've not been speaking to him, my concerns are:

1. He will kick off about something (can be angry and will be getting drunk!)
2. I will have to endure watching him getting with other girls (I don't know if his promise will still stand now due to us not talking)

I'm just twisting myself in knots over tonight so I guess that I'm just looking for reassurance.

I think 2) possibly bothers you more than 1). If he pays attention to other girls, don't watch - move off and talk to somebody, anybody.

It will all be ok; don't get drunk yourself, circulate and chat to everybody and if he speaks to you, smile pleasantly and say something like "excuse me, I must say hello to so and so..." and move off.

You can do this, the first time is hard but you'll have other people there to distract you and deflect attention. It's harder on a one to one so just grit your teeth, put on your lippy and be a social butterfly, show him that he doesn't matter - and believe it yourself.

Good luck though, it's hard, I know. :)