Being "dead" doesn't mean you don't feel. It doesn't mean you become numb or impervious to pain. You still feel deeply, both pain and pleasure,  highs and lows. Being "dead in Christ" means those feelings do not affect the "Joy of your Salvation" -  they do not move you away from Christ  - or closer to Him! It means your salvation and calling are assured no matter your circumstance.  It means you've become Christ-centered,  not self-centered.  Being "dead with Christ" means you re alive! More alive than you could possibly be without Him -  

                      "If we be dead with Christ,  we believe that we shall also live with Him"  -  we are dead and alive simultaneously! Rejection,  hate, flattery, any pain being in this fallen world causes us - we feel it all, deeply -  just like Jesus, but like Him, we do not let it alter the path our Father has us walking,  no matter how many turn against us,  hate us or try to kill us. "Your brethren that hated you, that cast you out for My name's sake,  said "Let the Lord be glorified" (by their hatred and rejection of you) "but He shall appear to your joy, and they shall be ashamed ". "Behold, i will make them of THE SYNAGOGUE OF SATAN,  which say they are Jews (or Christians), and are not, but do lie; behold I will make them to come and worship before your feet, and to know that I have loved you". 

Those that hate you and declare you unfit for God's love -  will be abased while Jesus himself exalts you before their very eyes. Being dead means you do not let a root of bitterness spring up, rather you grow a "root of betterness": you become a better person through every trial, every tribulation you endure.  Persecution = better person, Amen! Trials water the fruit of the Spirit with your tears and make the fruit taste even sweeter!