intrude into (something)
To involve oneself in something in a way that is meddlesome or unwelcome. A reflexive pronoun can be used between "intrude" and "into." I make it a point never to intrude myself into other people's personal affairs. Leave it to Mom to try to intrude into your relationship.
intrude into something
to get involved in something that is someone else's business. I don't want to intrude into your affairs, but I see that you're short of money. Please don't intrude into this matter.
intrude oneself into something
to work oneself into some matter that is someone else's business. I hate to intrude myself into your conversation, but don't I know you? Please do not intrude yourself into this matter.