Help please ? Tell me ur opinion or input🥺😭

Is it bad that I feel this way ? Can someone please he me understand me🥺 cause I been having trouble with understanding it but I started seeing this guy I really like him ,we hung out for the first time last week and I felt so comfortable and just so idk how to explain the feeling , he didn't try doing anything which I was glad because that's a big no for me but he's just the sweetest and kindest and he tells me how he's going to make me his girlfriend and he tells me how beautiful I am and more but I somehow feel bad because I still think about someone else , someone who was in my life for a very long time, someone who hurt me bad and I still forgave them, someone who I love and care for ..this someone is someone I haven't seen in about 3months but I heard his voice last week and something inside me got a little warm 😭 just by hearing his voice! Me and him can't be something we tried and its just toxic and not healthy.but why is it that I feel this way ?! Tell me what to do? Should I just focus on myself and let both of them go or try to see how it goes with the new guy because when I dont think about the toxic one I feel happy and I start picturing my life with this new guy 🥺🥺😭