Many students feel uncomfortable when obliged to communicate in English. Students' fear of speaking English is influenced by psychological reasons such as the fear of failing, being misunderstood, and making grammatical errors. Students' active participation in English class discussions might be hindered by shyness, nervousness, lack of confidence, and motivation. Helping these reserved students gain self-assurance and perfect their spoken English is a top priority for all English language instructors. In the classroom, teachers may use some simple methods to encourage their reserved students to open up and speak English with more ease and confidence. The existing literature on students' shyness shows that the gap in this realm is great and a critical look is needed. To this end, the current research intended to gauge the effects of self-esteem, teacher support, and critical thinking on anxiety and shyness in language classes. 385 language learners attending English language institutions took part in this research. They were at intermediate and upper intermediate levels. The findings of both confirmatory factor analysis (CFA) and structural equation modeling (SEM) point to the fact that improving students' self-esteem, teacher support, and critical thinking may have a moderating effect on students 'anxiety and shyness in language learning. The implications of this inquiry may be advantageous for language learners, language instructors, as well as policymakers.