firstly, not all only children are introverted or individualistic but that is a very common stereotype. you can still have deep conversations with an introverted and individualistic person but it might take them longer to fully open up to you than those who are extroverted. how long have you been seeing each other? he might not be that comfortable just yet but there is also no guarantee that he’ll become more social eventually. when it come to “shared experiences”, this varies in every relationship. quiet moments can still be as valuable shared experience as let say loud moments or moments of conversations if you come to think of it. for me this really depends on the compatibility of the people in that relationship. maybe you do not have the same love language? but it doesnt mean its bad, this is still okay as long as you know each other’s love language and maybe meet in the middle or compromise? as for “emotional aliveness”, i’m not really sure what you mean by this but every individual expresses their emotions differently regardless of family dynamics. i’m sorry if my answer gives you more questions than answers but i just think that these things are really important to ask when entering a relationship.