How do you get the Institute to join you?

[The Gent]

Here is the quests im on I was trying not to pick BoS or Institute thats why I told each one about Bunkerhill. Thats where I am in terms of main quest i think there are others too so let me know what to do so I get the Institute to join...I already got the BoS to join so the Institute are the only ones left
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[yaugie]

I think you have to do the next quest, "Mankind Redefined". This still wont lock you into any of the "vanilla endings".

 

[The Gent]

I think you have to do the next quest, "Mankind Redefined". This still wont lock you into any of the "vanilla endings".

i figured it out lol....you cant delete posts once you've made them unfortunately all i had to do was complete bunker hill and tell father we were ambushed. then after that they invite you to join the board of directors. once that happens you can invite them to join