Love Philly? So do we. Let’s be friends. Sign up for the Billy Penn newsletter today. After a decade away, the Philadelphia Cycling Classic will return to the city this weekend. On Sunday, tens of thousands of spectators are expected to line the streets along the 14.4 mile course that passes through Logan Square, Kelly Drive, Lemon Hill and, of course, up the daunting Manayunk Wall, While Sunday’s race is exclusively for professional riders, th…