Who should I Choose? I am so confused!!!!

I have been dating this guy for over a year. About 2 months ago, he started hanging out with an old friend of his again. Me and my boyfriend were having problems a couple weeks before they started hanging out again andonce I met his friend I started falling for him. About a week ago me and by boyfriend agreed that we needed to seperate for a while. I started seeing his friend and every day I fall harder and harder for him. We just connect and I haven’t felt this strongly about someone in a long time. I didn’t even feel this way about my ex-boyfriend when we first got together. My problem is my ex-boyfriend and I are still really good friends; we talk on the phone everyday, we hang out every once in a while, and we have a lot of the same friends. However, the guy I’m talking to now doesn’t want us to be such good friends. He’s afraid that I still have feelings for my ex since my ex is the first person I’ve ever had sex with. My ex is still in love with me and he’s my best friend and I don’t want to hurt him but I’m not in love with him anymore. I really want to try a relationship with this new guy but is it too soon to jump into another relationship? How can I tell my ex that I want to be exclusive with his friend and not hurt his feelings? Can I still be friends with my ex and have another relationship? Help I’m so confused!!!!!