Relationship advice for him in general might not be specific enough.
If you've been dumped by your girlfriend and want to get her back, you need the right approach from day one and the first encounter after you've split is a crucial test of your control.
What does your ex-girlfriend desire above all else? If you think that trying to get your ex jealous will win her back, get rid of that thought because it's a non-starter.
If you go down that route, she will find it even easier to move on and may think that she had a lucky escape.
Whatever the reason for the breakdown of your relationship, there's one thing that women love more than anything (including money!) and that's respect.
If you happen to cross paths with your ex and she's in the company of friends, don't go out of your way to make sure she notices you, but if she does, politely acknowledge that she's there and respect her space.
She may think this is an unexpected move and she will be drawn to contact you.
If she does, it will be because you have got her thinking about you in a good way again and you will add to that if you say something along the lines of: Hey, it was really good to see you enjoying yourself the other night Obviously, there are ways to get in the right frame of mind to genuinely feel like this, but the fact is, this is a much better approach than pouring your heart out to her at the first opportunity and applying pressure.
By doing this, she won't feel like she has to avoid you.
This is the first step to get her back after being dumped.
You need to rebuild the desire that was there in the first place and relationship advice can go into great detail but until then, ensure that you don't push her away by putting pressure on her.
Neediness and arrogance could be tempting traits to show, but avoid them and you're set to win back your ex.