Absolutely. But I would say it is an ongoing, lifelong conversation and learning process. Not just 'a talk'.
I would certainly tell her that people who are decent, will respect her feelings and never expect her to put their wants, before her needs though. Talk about people in general, not just boys. Because at this age she may start to meet frenemies too.
Talking to her about how to spot narcissists and the like early on might help too. Discuss how manipulative people often 'love bomb'. That people who are sane, give you some space and don't rush you or monopolise your time so much that you dont have your own time and space to think.
And that consisteny of our actions are what count, not just words. Judge a person when they prove they are good to their words.
And that when it comes to words, that we shouldnt make excises for people who hurt us. People who fail to appologise or continue their hurtful behaviour. That it is nota womans job to excuse means bad behaviour or look for the cause. If someone is mean to you it is often simply - because they are mean.
Talk to her about gaslighting and how to spot it. Make her aware that 'normal' folk dont gaslight, that it is the calling card of a predator.
Tell her, if in doubt - mumsnet :)