When you happen to be some place with someone you're not comfortable being around, it can be awkward.
When you end up in the same place with someone you don't like just by chance, it can feel a little uncomfortable.
ーWhen you happen to be some place with someone you're not comfortable being around, it can be awkward.
「近くにいると気が詰まる誰かと居合わせると、気まずい」
happen to be some place with someone で「誰かとある場所で居合わせる」
awkward で「気まずくて」
ーWhen you end up in the same place with someone you don't like just by chance, it can feel a little uncomfortable.
「嫌いな人と同じ場所に居合わせてしまったら、ちょっと気まずく感じる」
to end up in the same place with someone by chance で「誰かと同じ場所にたまたまいることになる」=「偶然居合わせる」
ご参考まで！
カナダ 
