你可以加我好友吗？
Can you friend me? / Friend me, please.
我可以加你微信/QQ/脸书吗？
Can I friend you on WeChat/QQ/Facebook?
《柯林斯》friend 及物动词
verb
If you friend someone, you ask them to be your friend on a social media website, so that you can see each other's posts.
People you have friended on Facebook could be complete strangers in real life. [V n on]
He friended dozens of other graduates of his college. [VERB noun]