Is it normal if to predict being alone?

I think I'm gonna be alone after breaking up with my ex. Well he broke up with me and he was my first love so now I'm just completely heartbroken. So I guess you can say now I'm one of those people who are scarred and scared to love again. I dont think Ill go through another relationship like that. When i start feeling what I felt for him for someone else, I'm gonna stop myself because it hurts way too much. Even though I dont think I can love someone like I loved him, if it were to happen, I'd probably run away. It sucks. I remember before going through this I'd run into people who had this experience and would say they're scared to fall in love with so and so, or scared of getting hurt, and I just didn't understand them. Well now I do. I cannot go through this again, it's way too much. In fact, funnily enough he mentioned in the beginning of us dating that he was scared of getting hurt again when I would question why he held back from showing emotion to me. He said he got taken advantage of and hes just more cautious now with girls especially when he feels something powerful. So I dont know if he was making an excuse or saying the truth. But now I can see myself feeling that way if I were to fall in love again. Even if he were to come back to my life, I'd be too scared to take him back. I don't know how long or what it takes to get over that fear.