Hello Friend, Good that you are seeking a help here. Any relationship break up will take time to accept the failure and adjust with reality. More you try to forget about that individual , you will increase his memories. Learn to accept reality and focus on other priorities in life . I know it's easier said than done.
But with a professional counselling support, you can manage your emotions and feelings better and recover from this depression soon.
Next Steps
If you are not able to manage yourself, then consult a counseling Psychologist directly or online. Feel free to reach out to me online through Practo app chat for further evaluation and recommendation. Be positive. You will be alright soon.