"(๑u 3(≧U≦✿)" is an emoticon typically used to convey a cute or flirty expression, often indicating a feeling of happiness or excitement. It can also be interpreted as someone blowing a kiss or making a kissing face. There is no specific emote for "He is kissing my neck," but it could potentially be conveyed through the use of other kissing or romantic emoticons, such as "(づ￣ ³￣)づ" or "(っ˘з(˘⌣˘ )".