I'm seriously feel like Ian going mad! I constantly
Think about my ex who to be honest isn't the easy
To live with.
I want to forget about him and move on to which I e been seeing
The most fantastic man I've ever met.
My head is spinning and feel sad!
I'm wishing my new man could be my old one he gives everything
He didn't and more!
What's wrong with me!

Perhaps you have unresolved issues with your ex. You never said why you and your ex broke up?
If you want it to work with your new boyfriend then you need to stop comparing him to your old one. Often an ex is an ex for a reason. Think about this. Are you looking back on your relationship with him with rose tinted glasses?

If you like this guy then you should try to give it a chance.

What happened with you and the ex? How old are you both?