While I was studying abroad, it seemed like no one was interested in talking to me and it was really painful.
While I was a student overseas, it didn't feel like anybody wanted to speak with me and it really hurt.
どちらも「留学中、誰も私に話しかけてくれなくて苦痛だった。」という言い方です。
1) While I was studying abroad, it seemed like no one was interested in talking to me and it was really painful.
2) While I was a student overseas, it didn't feel like anybody wanted to speak with me and it really hurt.
「留学中」は
while I was studying abroad「海外で勉強中」
while I was a student overseas 「海外で学生だった時」
などと言えます。
「苦痛だった」は
it was really painful「とても苦痛を与えるものだった」
it really hurt「とても（心が）痛んだ」
などと言えます。
ご参考になれば幸いです！
日本 
