My ISFJ boyfriend:
Hugs hello and goodbye when it's someone he hasn't seen in a while, otherwise just smiles and waves and greets people outside the house, escorting them in.
Always hugs or kisses me hi or bye.
When we were first together, used to come up behind and hug and kiss me (like if I was cooking or something), but not really anymore.
When he is particularly happy with me (pretty often) he says sweet things like, "You're the best, I love you!" and tells me what I'm good at (like, "You're the best at making pizza!") that is followed by a smooch and a hand squeeze or hug if I'm standing near him.
When we were first together (first 6-8 months) he always held my hand when we walked and mostly we put our arms around each other (even going to the store) but now we just hold hands sometimes, and he'll put his arm around me occasionally.
He doesn't like to make out without it leading "somewhere" hehe...
If I do something he considers really good (like we went to his Aunt's for Thanksgiving last year and I tried to get to know all his relatives and played poker with them) he asked me if I wanted to get some air and then we walked outside and he told me, really lovingly and seriously, how I was the best girl and the only one for him and how great it was that I made treating his family well a priority.
So, generally, not that affectionate/emotionally demonstrative, but he is very loving at the same time with words and such. Also, when he DOES give me a hand squeeze or say something nice to me, it holds special meaning and makes my day because I know how hard it is for him to express his feelings and I know how sincere it is.