AIO for leaving him

Am I being over dramatic.

Boyfriend 59 me 45 we have been together 15 years this past Feb. For the majority of this I was the bread winner. Than he got me a job where he worked and forr 4 1/2  years no problem . Until we consolidated offices . About 6 mtgs prior  this coworker from the other warehouse started acting weird, she threw some stuff down on my desk , they were mislableimg things saying I did it. Basically trying to sabotage me . She started wearing makeup to work . She was late every day .. finally this women just had to let me know she was fucking my boyriend . So I told upper manage memt 30 min later I was fired.. so I left work and I left him and I haven't been back. 

I feel so betrayed , we were thinking about adopting getting married and boom . He still hasn't apologized I dont expect him too . However I look at him differently,  I am also taking legal action with the job  and I feel bad however he made this bed now he has to lay in it . This wasn't just cheating , he took my  entire  income away . How in the world is that looking out for us.  This happened in Aug. 2025 how do you stay motivated when u just lost everything . Literally