How should I deal with this guy ?

I'm a middle age woman working in an IT position. Recently, there is
a issue confused me and I try to find some ideas and supporting from
you guys here.

Thanks in advance.

My collegue is a young white guy. He is very smart. But I just don't feel comfortable to working with him. Because he is too aggresive. E.g. Each time as my boss or RAs come to our office for question, he appears very active to answering all them, even some of those are actually related to my projects and not his.

He also write email to annouce peoples some conjunt projects are done without metioned any of my efforts.

Beside his aggrisave behave related to working fact, he is a very nice and sun shine boy. I understand that he really tries to show off himself for future promotion (He actually got a promotion last year). But it hurts me.

Should I tell him my feeling?