This depends so much on the source of the insecurity. However, we have to adress one thing first - you shouldn’t have to feel bad being around a friend. If doing these things bothers you, then don’t, for your sake and theirs. Feeling bad around your friend will (as you yourself said) end your friendship over time. There has to be space for two in a relation.

For me at least, honesty is key in a real friendship. It is the most basic aspect of respect, and if something is bothering you, say so. No need to be accusatory (i.e you do this or that) and instead frame it from your own perspective, dropping it in natural conversation (“It really makes my day when…”, “It really bothers me when…”). Someone who values you will pick up on these things.