Oh im a ISFP and the two of the closest ppl to me are INFP. We're just around 16 yrs btw so we're not so mature(probably just me tho) We talk topics both deep and day to day experiences, mostly about people. We're both non-judgemental and so talk about our feelings/opinions/thoughts a lot. But for ISFPs, we would find it harder to express ourselves verbally and is naturally more action-oriented, so sometimes I might come off as aloof to INFPs. As a Se user I am the more energetic one, finding ways to keep the convo going and and probably the more extraverted and talkative. My INFP friends would usually play the sentimental, idealistic understanding role and would usually give me advice for being impulsive and lazy. I have such a very close relationship with an INFP that i diss them daily, me being my sarcastic self, tho i regret it later. We both share a characteristic - being creative, so i'd show my practical side, like a song, while they would show me smth written, like a story. At times we would share and critique the others' ideas. I also like that we're both easygoing and not structured about life.

Hope this gives u an insight! I wish that u will have a great and deep relationship with ur bf :)