How to not lose feelings so fast?

I have noticed a pattern with all the relationships I’ve been in. In the beginning in the “honey moon” faze I’m super lovey to them and clingy and like all the attention and spend lots of time with them and text them daily. But then after a few months I just completely lose all feelings I originally had completely and I don’t want to hang out that much if at all. I don’t text them everyday anymore and I don’t get made if they ignore me cause I’m basically doing it to them and I just don’t put the same effort into the relationship anymore cause I’m just not feeling it anymore and eventually we break up. I’m sick of this cycle and being that person and I want to look at someone a year into the relationship the same way I looked at them from the beginning but I don’t know what’s wrong or what to do to make that possible.