It doesn't mean that is one kind of 'first impressions' .人生如若初见 means that the lovers' ralationshiops and feelings are alway good at the beginning ,that will be wonderful if we can keep it forever in our lives.However,as time goes by,the guys will change and their ralationship won't be the same like before.So the poet said 人生如若初见 ,then people could own the wonderful relationships forever in our lives.