If you feel that a psychologist would help, there is no shame in looking for one and making appointments. I do agree that we become stronger and grow more as humans when we can overcome our adversities on our own, but there is never shame in seeking help from others if you get stuck.

When we are with someone we love and adore and someone that makes us happy, we have natural chemicals released in the body such as dopamine and serotonin, along with others. It gives us this natural high and of course with any high we feel, it can become addicting and delicious. So maybe looking back onto his profile releases some of these chemicals you have been familiarized with when you were with him. And maybe in some ways, you don’t want that feeling to go away.

Ultimately you are in control of your happiness and you have to realize this. Your friends and family are there to comfort you, but they can’t make your decisions for you. You are the only one who can decide whether this habit of yours is benefiting you or not (which you’ve made it clear that you do not wish to continue what you’ve been doing because you feel you are wasting your life). So now you need to find ways to overcome this, with or without help.

Also, did you find closure with your ex when you two broke up? Because often times we obsess over finding answers and clarity when a relationship ends unexpectedly. Maybe what you need is closure? Just tossing some ideas out there.