I felt a bit like you when I was pg with my first.
I knew I wanted to try and do it, but, up until that point breasts had always been a 'sexual' thing. So, I was quite unsure about how I would feel about actually doing it.
When the time came I was exhausted after finally giving birth, and, it just seemed right to cuddle her up and have skin to skin contact with her.
I fed her for 6 months. Second time around I was matter of fact about it. I ended up feeding DS for 2 years, and wasnt fazed at all by b/feeding in public. It does take some getting used to though. You've just got to remember that it is a natural thing to do, people cant see much of your breast anyway (if you are concerned about that).
Finally, if it really doesnt work for you, then thats absolutely okay too