Go to a white-light healer and ask her (it will usually be a her) to get your ex back.
They’ll start bullshitting you about how desire is the fruit of attachment and the source of all pain, that all things are as they should be, and that if it’s meant to be, the wise loving universe will ensure your ex gets back with you and stops making you suffer, but actually, you are really wrong to try and compel another’s free will, and that the white-lighter will certainly not assist you.
But for a modest fee (or maybe a “donation,” so you’re left wrangling with your own conscience, in advance of any work being done, how much it would be righteous to humbly donate to this fount of wisdom) that they will assist you in healing your past insecurities and traumas (which were really just your own past life karma, giving you what you truly deserved) so that you can move beyond attachment to such petty things as happiness, good sex, companionship, and having the parent of your children come back into their lives.
Then they will do some vague thing seated firmly in their own belief that nothing, really, needs to be done, or can be done, so you will be more or less guaranteed to only receive advice about more detachment, more focus on your own flaws, and the standard platitudes of the mystic, the person who fundamentally despises embodiment and wishes to infect you with their mind-virus as well.
Go to E.A.?
He’s going to do what he can to get your ex back.
That’s what this means - aiming for the real result, not the bullshit high-sounding justifications of why you can’t have it that comprise the bulk of white-light, spiritual healing, and similar forms of anti-life mystical nonsense.
Magick is about results; mysticism is about coming up with plausible un-falsifiable reasons you can’t have the result and probably shouldn’t want it anyway.
And most people in the marketplace these days are mystics, no matter what they claim, so choose accordingly.