In love with two men at the same time..Idk what to do?

Guy #1 ive known for more then 10 yrs. Ive always been in love with him but we were always just friends. Guy #2 ive known for about 3yrs. He has been there for me through all the pain that guy #1 caused. He was my shoulder to cry on. 2 months ago guy #2 tells me he loves me and we wind up dating. Its the first time im happy in 10yrs. I felt like i was finally getting over guy #1. Until last week. Guy#1 comes up and says how much he misses me and wants to start over..that im "the one". Insantly all the feelings came back. It took me 10yrs to push them away, it took him 10secs to bring them back. What am i gonna do? Ive loved for my whole life almost and i prayed for so long to hear him say these words but why now? Now that I was happy and moving on. I told my bf about it, I don't hide anything from him, I never did. He said he just wants me to be happy, but he makes me happy too. Neither one of them is pressuring me but I know it's not fair to continue like this. I don't want to hurt either one of them or myself for that matter. I don't want to lose either one of them. Guy#1 was my first love and maybe this is fate? But guy #2 has been there for me always, how can I hurt him? I guess I just need some advice please.. I'm not a cheater, they both know what's going on.