I miss my ex-boyfriend so much

I’ve been single for 8 months already but I can’t get over him yet. My ex-boyfriend who cheated on me through seeing another woman has left a big scar in my heart. But still, I miss him. I miss him so bad. Is that even possible for someone who was hurt so much? And I think I’m still into him. But a part of me wants to move on already, I think I deserve someone better. My friends keep on telling me that I should look for outlets to move on, like meeting some old colleagues or signing up to foreign dating events. But the main question is, can I do it? Please help me.

I really hope I can-- closed fingers to that. Thanks!