I dont no why i did it

I was goin wit this boi for 5 months and i broke uop wit him and i dont know why?? but i called him 2 day and we talked and everything..and i know he wants me back and i want him back..and i know that all i have 2 do is ask him bacc out..and i know he will say yes..just by the way he was talkin 2 me..but im nervous 2 do that...all i got 2 do is ask..but im scared...so if your goping throgh this..DONT BE SCARED!!! but 2 morrow i will ask him..but im still nervous