You aren't in the position to date, or enter another relationship yet.
You aren't over your ex, nor have you begun the healing process..to be able move on.
Things won't possibly go successfully until you do.
Don't use people to try and make your ex jealous or want to come back to you...
Don't try to jump into relationships because you aren't comfortable with being single .. (it's probably best if you were single for awhile...like a year or more) You just got out of a relationship recently and looking to jump into another ...possibly soon.
Also...
Don't use people as distractions...
Distractions to avoid or procrastinate from doing the work to be healthy enough to date, to be in a relationship again( if you choose), to gain self respect, worth, and esteem, to heal, to grow, to mature, to feel comfortable, etc...