Needing advice..

Hello everyone!

I don't know how to start this off, so I'll just go in and say it. I'll try to make it short. I had finally gotten into a relationship 3 weeks ago and no longer together. We only dated for 3 weeks. Anyways, this guy I was dating had pursued me and we talked first for week before we started making it official. He had asked me out on a date like the third day. The crazy thing was is when he first asked me out on a date, I told his mom because we work together. But, her son didn't know I worked with his mom lol Me and this guy had a wonderful time. Really! He always paid for our meals when we went out and he would buy things. I was no secret. I felt special and loved. At one point, I thought this was too good to be true. We were always together and he was always the first to initiate things. I was the one that told me he was falling in love with me. One night when we were out he asked, "what are you doing to me?" Lol, I know that sounds a little naive but he had a look of admiration in his eyes and I just knew he loved me. He was always staring at me even when I'd look away. But one day, we had a good weekend, I thought. It was me, him and his brother; we just spend the day drinking and hanging out at the river. Well, sunday I messaged him at 12:30 pm and just told him I loved him and have a good day. At first I wasn't going to because i loved to hear him tell me good morning everyday lol well i didn't hear from him until 7:00pm. All he said was "Thanks, I actually had a really bad day. Sick and hungover. I'm going to rehab." I said, oh I'm sorry you were sick, rehab will be good for you." He says, I know it will. So the whole time I'm messaging him, hes short with me and he was never like that with me. So I asked him if he was going here or the one in Texas. He said Texas. Then he says,"I dont have time for a relationship in my life right now. I'm just a drunk fuck."..I texted him two more times, nothing mean and he had never replied. So a week later, he still had me on FB and I see him tagged in a photo with another girl headed to texas. I told his mom and she said it was his "damn ex." His mom, his brother and her husband says that the only reason he's with her is because she drives a challenger and she gives him money. Shes way older than him. He's 26 and shes 40 something. So when I seen that I was upset I put up memes that reflected how much of a good person I was and how i will meet a good man (something along those lines) and he deleted me. So i know i hit a nerve with him because he knows i was good to him. He played like he was the victim on fb. So anyways, my questions. My main one, if it ever comes to it should I take him back? Would ever try to come back. Why would he leave me if he loved me? Would he ever miss me? I know these are impossible, but I just can't stand it. Any advice would do. I would love to read your opinions and advice. Thanks.