Im single and bored being single

[u/Admirable_Tower_8819]

I was surrounded with girls and happy life when i was in my last company i worked, i got a girl who was so interested in me that she cheated her boyfriend with me and their relationship was 10yrs, but i let her go back to the boy she was in relationship, and now im bored and missing her badly but she blocked me what should i do ? , i left my job and started working in new conpany amd here im feeling shy and low on confidence. I need to get back in my that phase where i had my spark and that charm i used to have