Please help I’m freaking out!!

So I’m in a relationship a serious one and my ex texted me this morning asked me how I was o asked him how I was kind of thing and he asked me what was new in life I told him nothing I didn’t tell him I was in a serious relationship just cause it’s none of his business and o don’t trust him or any of his friends that I do know then he was asking me if we could hang out we are kinda friends we have hung out In the past after we were together for 5 years. But we haven’t hung out for about a year when I was I was not in a serious relationship or any relationship at all and to make him think I was not in a relationship I told him yes ( even though I’m not going to) I know that’s rude we were in a abusive relationship but things did end well. I’m not going to hang with him I don’t want to and I blocked him on my phone and I don’t know how to tell my boyfriend and I feel like I have to I hate keeping things from him so how should I tell him? I told him this morning that he texted me but I didn’t tell him anything that we talked about even though it was small talk but he was upset cause I texted him back and I know I wouldn’t like it if he was eating his ex and he brought that up. So how do I tell him I told my ex I would hang out with him to just make my ex think that I was not in a relationship cause I didn’t want him to know even though I’m not even going to.

Please no judgment!! Just please help!