There's two manga that I haven't been able to find. One is about a man who rides the train and meet a younger guy. The man is in love with his co-worker but hasn't been able to confess. I think the younger guy helps him by listening to him and in the end the man ends up with his co-worker.
The other manga is about a guy who is a virgin and asks this guy to teach him how to have sex. I think he chose him because he saw him going out with a guy and I don't remember the rest.
Can you guys help me out?
the first one sounds like: http://www.mangago.me/read-manga/3_ban_sen_no_campanella/

It's about two best friends that are really close. One day, one of them starts to interact more with other people and the other one gets jealous. She even starts copying her. She dresses up like her and starts having the same hairstyle.
Can someone help me find it?
Maybe it’s in the tag?
http://www.mangago.me/tag/Copycat/
It's not there, but thanks(. ❛ ᴗ ❛.)