How long does it take to get over a long relationship?

Obviously there is no right answear to this question. I was with my husband for 5 years, lived together for one year when we separated, went to therapy and sadly got to the conclusion that it isn't working out and we just want different things in life. I think breaking up peacefully is sometimes harder than when you breakup in rage or in a fight. The sad realisation that love is just not enough while wanting to fulfill seperate dreams... That being said around 3 months after the breakup I went for drinks with a friend thag kind of knew my situation. We went out two more times and of course I noticed he is starting to like me so I felt the need to tell him some more details and also that I'm not ready to comit to somone else at the moment. He was really understanding and said that he expects nothing from me and just enjoys my company. Well damn 2 months into hanging out I'm now kinda falling for him and I like being around him + we text a lot. It feels so weird because this is definately a bit too fast for me but also I'm just listening to my gut and enjoying my time with him. When I think about love my ex is still there, that feeling of love still belongs to him and I feel like I won't be able to love like that again. I feel so bad towards this other person but then again I've been open about it the whole time and he is always supportive. I'm just afraid there will come a moment when this support stops and he will expect more and I won't be able to give more...