Nie jestem jakoś szczególnie dobry, więc najlepiej niech ktoś jeszcze to sprawdzi i poprawi. Więc ja bym widział to tak:
Hello! Your projects are great! Could you do me a favour? Could you do a project for me? I don't want to be competiton for your friend's side. I also keep the side about . . . I will be grateful to you for the response. Regards.