Is it possible?

Is it possible to hold feelings over a long period of time….. when i say long i mean long….. we are talking 2-3 years. Do you think that’s long? I don’t know it is kind of long and the fact that i haven’t seen the person i have the feelings for in a long time we are talking more than one year. Ok i think i should tell you about this person. This person is my ex ….. we didn’t date for long. When we broke up we still had strings attached and it has bin that way since.  We lost contact after a while when i moved away but we later got talking and the feeling resurfaced. But I'm wondering how long these kind of feelings can last forever?? for the next ten years?? twenty?? Till i get married?……. I try to hide it from my ex but it keeps coming up anytime we talk we talked about it and i was happy to find out that it is a mutual feeling…. I hope we meet this summer to talk about everything but i know we cant really have a relationship because of the distance between us but…. it would be nice to see him again even if it is only for one day

P.S: I am not crazy btw lol…..