Answer in Details
You may pray to Lord Shiva with sincere devotion, chanting the "Mahamrityunjaya Mantra" or the "Om Namah Shivaya" mantra, asking for inner strength, wisdom, and the ability to heal and rectify your relationship. Remember, Lord Shiva values honesty, humility, and self-improvement.
It is also important to express your feelings and seek forgiveness from your beloved directly, showing genuine remorse and a willingness to change. Ultimately, Lord Shiva teaches us to accept the outcomes with equanimity and faith, knowing that what is truly meant for us will come to us.
Offer your prayers, perform abhishekam (ritual bathing of Shiva Lingam), and strive to become a better person. Place your trust in Lord Shiva, and let your actions be guided by love, respect, and truthfulness. May Lord Shiva bless you with peace and guide you on the right path.