Is it normal if i dont mind being his backup plan?

At the end of the day, he's probably just being immature and thinks he knows what he wants and sooner or later, he'll realize it was me all along who was right for him. To me, that's a compliment. Maybe it's cause rather than seeing the presence of it, I see the future of it. However, it's not totally official I am his backup plan but this just came up in my head that it's possible he is using me as one. We broke up recently and agreed to stay in touch. Well hes def using that to his advantage because so far hes the one whos been contacting me and it's only been two weeks. And yes hes the one who broke up with me. I honestly was giving it maybe like a month til I heard from him or til I couldn't resist anymore and contacted him but he just went straight for it. Hes just been sending me mostly funny stuff which isn't surprising cause he did say one of the things he loved about me was my sense of humor and how much I made him laugh. So at first, I took it as he misses me but hes prob never going to admit it unless I bring it up to him. But then I started questioning why is he wanting to talk to me but doesn't want to commit to me? He obviously likes and misses my company so what gives? The reasons why we broke up was essentially cause of circumstances we can't fix at the moment, well according to him. So I'm just saying if he misses me and keeps talking to me, then how hard is it for him to just be with me? So thats where I came to the conclusion that hes possibly using me as a backup plan. Perhaps keeping the communication alive "just in case." Yes it sucks if it's true even though I did ask him if he thinks he can find someone better than me and he said no that's not it. He could be lying but w.e. But then I just realize he just thinks he can do better than me so let him be, let him come back crawling to me and most likely I will be here cause I love him. Ill just be like "okay now you're ready for me?"