How do you get back your ex-boyfriend if he is now with another woman but he still loves you and you love him too?

You didn't say if he actually told you he loved you or you are second-guessing him. If he loved you he'd have no problems leaving the other woman. If you've been talking to him all this time then tell him it's you or the other woman. Give him that ultimatum because he could be playing both of you women for fools.