I wonder if a omega can pair with a beta?

Sadly no but here beta can impregnate an Omega so lets see what happen the next chapter..

Owww man...... Ok (〜￣△￣)〜 ╥﹏╥

hmm, that's hard to say. there's no "fated pairs" of beta and omega, but it's not like it's impossible for them to be together. this happened in another manga - romantic joutou, i think? the omega MC was mated to an alpha but he was in love with a beta, and they managed to have kids. so there's hope yet.

Wow really! I hope it works out that way!