In a typical English language classroom, learners are expected to produce written sentences that are grammatically correct, and they are expected to sound native-like in their pronunciation. However, such expectations may cause anxiety and could potentially hinder the success of creating functional and successful language learners. This study aimed to understand undergraduate students’ language learning anxiety and their perceived success in an ESL classroom in the hopes of creating a mentally healthier language learning environment. Through a quantitative approach, the results of the questionnaire showed that reasons that led to undergraduate students’ anxiety in an ESL classroom were fear of tests, fear of comprehension, and fear of negative evaluation by peers. The results also showed that undergraduate students felt less anxious when lecturers provided non-threatening or mentally healthier environment for students to learn in their classroom. It can be concluded that a lecturer’s teaching styles and strategies affected students’ level of anxiety and can help ensure a mentally healthier language learning environment. From the findings, it is recommended that lecturers create a less formal and friendlier classroom atmosphere by providing psychological support and making students aware of the possible channels to seek help when needed.