Will I be wrong?

I met this guy May 2021 and we started hanging out. He started pursuing me after a couple of months and I was upfront about my situation at the time but he never disclosed his side. We then started dating end of October 2021. I found out he had been talking to a girl he had fling with early 2021 which was okay with me until he started being shady about it. I later found out that a day before we became a thing he was telling her that he had been rethinking about their whole situation and asking why she had stopped talking to him. He claimed he wasn't talking to anyone from the day he started pursuing me. I told him repeatedly I couldn't stand lies because of what had happened to me in the previous relationships and that trust was very important to me. In the two months we dated he kept reassuring me that he'd never lie and that he was scared of lying to me since he'd then lose me. After we got together I noticed he had deleted their text and she'd call from time to time. A friend of his told me she called him whenever wanting him back but he'd shut her down (I don't know if he's just covering for his friend). I asked him what the deal was with the girl several times and he either deflected, got defensive or avoid answering. December 2021 I found out that he'd sent me a little poem he'd written for her claiming it was about me which honestly made me feel awful. During Christmas he wanted to send the girl fare so they could meet up since I was originally supposed to spend the day with my family. He said that she claimed she was pregnant and he was sorting the issue out before letting me know, that's why they were still in contact. His reason for sending fare was to confirm the pregnancy. After finding out I told him I'd rather be single than play games. He apparently later found out from the girl's friend that the pregnancy was a scam and blocked her. He blocked her and said he'd get rid of anyone who came between us. Since January 2022 he's been trying to get with me saying things will be different and the lies won't happen again. I love him but I'm so scared of getting hurt again. Will I be wrong to give it another chance?

.. ask yourself why this guy lied to you in the first place. If it was all ok, you guys wouldn't have had the bump in the road which is his baggage with his ex. It's been his indecisiveness and his lies which have made you wary and destroyed any early trust that you guys were building together. Love him? maybe.. but listen to your gut rather than to your heart.

You told him that you wouldn't stand for lies the first time, and he lied anyways. Even after telling you that he knew he would lose you if he lied. Why would you possibly want to take him back?