There is no doubt that when we break up while we are still in love with him, for the first period of separation we want and seek to maintain contact with him, because in the back of our minds we always have the possibility of a reunion.
But staying stuck in a past that doesn't deserve you isn't good for your psychology, and of course you wear blinders and don't see other men around you who might be flirting with you.
After some time has passed and you have given yourself time to heal the wounds of your heart and you are sure that you have forgotten the "retired one", then, yes, you are ready for the next one!
Don't forget that in your next relationship you shouldn't make the mistakes of the past and you should choose him with logic and sift through him. At first, be friendly and then you see and judge!
Should your current partner know everything about your ex?
A current person doesn't necessarily need to know everything about your ex, such as, for example, their name, where they live, where they're from, where you used to hang out, etc.
If necessary, you will only tell him what you need to, such as the reason you broke up or if you are hesitant about your current one, tell him your concerns.
In case your ex is bothering you or you're still talking, your current one should know, because I'm sure it would bother you incredibly if your current one talked to his ex behind your back.
Don't forget that besides love, he has other feelings for you and he might get jealous or angry if you keep mentioning your ex. It's a shame to lose him because you don't show that you want to move on (isn't it a shame that he stays stuck with you when he can find something else in his life?).
With your new relationship, you need to discover new things, hangouts, etc. and stop mentioning everything you did with your ex!
If you don't let go of your past, rest assured that there will be no present-future with a new partner.
*Photo taken from the site instyle.gr*