Boyfriend drama. Help needed

So me and my boyfriend have been dating for almost 5 months and everything has been pretty good up until recently where we are bickering quite a lot. We’ve had maybe three big fights but we are always fine when we see each other. I have a feeling the “honeymoon stage lovey-dove” stage is over and the relationship just feels so different because it’s like he’s just stopped trying as hard to be with me. I really want to make this relationship work because I love him a lot and I’ve wanted a future with him for a long time, even before we started dating. Anyone have any tips on what to do and how to make it last? Thanks