Kailyn Lowry isn't the best at showing emotion.

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In an Instagram post earlier this week, the Teen Mom 2 star thanked her close friends and family members for all they've done for her in recent years, and admitted she struggles with affection.

"I don't do this often, mainly because it's hard for me to be affectionate in person. And if I can't do it in person, why do it on social media? BUT, today I wanted to thank people in my life that I haven't thanked lately, or enough, for just being a part of my journey," Lowry wrote on Wednesday.

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Lowry and her husband, Javi Marroquin, have been featured for several years on MTV's 16 & Pregnant and Teen Mom 2, and recently began filming the latter's sixth season.

"I cannot believe every single one of you lives in a different state, literally, every one of you and how big of roles you all play in my life and my family's lives," Lowry continued.

Although the reality star and mother listed the names of several members of her friends and family in her Instagram post, she did not including husband Marroquin, which caught the attention of many fans.

Lowry and Marroquin got married in 2013 after about a year of dating. The following year, the couple tied the knot for a second time, and one month after that, they welcomed their first child together, son Lincoln Marshall Marroquin.

Lowry also has another son with former boyfriend Jo Rivera.