Question to guys who had their heart broken

I recently had a breakup 6 years relationship, brutal breakup don't wanna get into it, it's been 8-9 months now I think I have got the courage to stand back on my foot again, i have a healthy lifestyle again and diet and i focus on my life and trying to do good by my parents is the motive that keeps me going, but I have noticed ever since the breakup my confidence has been shattered to core , I used to be this guy who had unlimited confidence coz everything was great in my life but now it's just I have literally second thoughts even if I should do something that is good for me or talk to someone that'll be beneficial for me, I just can't feel the usual flow of energy that was there, if I can go on without it I tend to take that path rather than taking that extra step which I used to do because I had extra confidence , how do I go back to that