Update: his other gf called me recently, she found my number on his phone and she was trying to ask me who I was. He called me later telling me she was crazy and asked me to cover for him and tell her we're just friends. She was screaming and crying saying she would 'smash the place up' and I heard him tell her to step back in the background. I was worried she'd hurt him so I covered for him. Then he called me and asked me for one more chance when I tried to break up with him and told me that he was only with her because she kept threatening to kill herself if he left and he felt bad for her because her mum passed away recently. He said he doesn't want to be with her. Hes been with his gf for 4 years