Let me quote the lager passage of Matt 5:38-48 -
38 You have heard that it was said, ‘Eye for eye and tooth for tooth.’ 39 But I tell you not to resist an evil person. If
someone slaps you on your right cheek, turn to him the other also;
40 if someone wants to sue you and take your tunic, let him have your cloak as well; 41 and if someone forces you to
go one mile, go with him two miles. 42 Give to the one who asks
you, and do not turn away from the one who wants to borrow from you.
43 You have heard that it was said, ‘Love your neighbor’ and ‘Hate your enemy.’ 44But I tell you, love your enemies
and pray for those who persecute you, 45 that you may be
sons of your Father in heaven. He causes His sun to rise on the
evil and the good, and sends rain on the righteous and the
unrighteous. 46 If you love those who love you, what
reward will you get? Do not even tax collectors do the same?
47 And if you greet only your brothers, what are you doing more than others? Do not even Gentiles do the same?
48 Be perfect, therefore, as your heavenly Father is perfect.
It appears quite obvious that Jesus is giving a series of rules about how we should love our enemies. The entire passage is about the behavior of Jesus' followers/disciples.
Therefore, the passage applies to "you" or "us" as Jesus' followers. However, I note the important principle contained 1 John 4:16, 19
And we have come to know and believe the love that God has for us. God
is love; whoever abides in love abides in God, and God in him. ... We
love because He first loved us.
Thus, in loving our enemies, we follow Jesus' example.