When trying to determine if an ISFJ (Introverted, Sensing, Feeling, Judging) is flirting, it's important to consider their typical behavior and communication style. ISFJs are known for being warm, caring, and considerate individuals who value harmony and stability in their relationships. Here are some key indicators that an ISFJ might be flirting with you:

1. Increased attention and engagement: ISFJs are generally reserved and tend to observe others before opening up. If an ISFJ is flirting, they may show a noticeable increase in their attention towards you. They might actively seek opportunities to engage in conversations, ask questions about your interests, and remember small details about your life.

2. Genuine interest in your well-being: ISFJs are empathetic and compassionate individuals who genuinely care about others. If they are flirting, they will likely show a heightened concern for your well-being. They may ask about your day, offer support or advice when needed, and show genuine empathy towards your feelings and experiences.

3. Thoughtful gestures and acts of service: ISFJs express their affection through acts of service and thoughtful gestures. If an ISFJ is flirting, they may go out of their way to help you or make your life easier. They might offer to do favors, assist with tasks, or surprise you with small gifts or gestures that show they have been paying attention to your needs and preferences.

4. Increased physical proximity and touch: ISFJs are generally reserved when it comes to physical touch, but if they are flirting, they may become more comfortable with physical proximity. They might stand or sit closer to you, initiate light touches on your arm or shoulder, or find excuses to make physical contact in a subtle and respectful manner.

5. Playful teasing and humor: ISFJs have a playful side that emerges when they feel comfortable and at ease. If an ISFJ is flirting, they may engage in light-hearted teasing or playful banter with you. They might use humor to create a positive and enjoyable atmosphere, trying to make you laugh and feel at ease in their presence.

6. Nervousness or shyness: Despite their warm and caring nature, ISFJs can be shy and reserved, especially when it comes to expressing romantic interest. If an ISFJ is flirting, they may display signs of nervousness or shyness around you. They might blush, fidget, or have difficulty maintaining eye contact, as they may feel a bit self-conscious or anxious about their feelings.

7. Increased availability and willingness to spend time together: ISFJs value quality time and building deep connections with others. If an ISFJ is flirting, they will likely make themselves more available to spend time with you. They may initiate plans, suggest activities or outings, and show a genuine desire to get to know you better.

It's important to note that ISFJs tend to take their time when it comes to romantic relationships. They may be cautious and want to establish a strong foundation of trust and compatibility before fully expressing their feelings. Therefore, it's essential to be patient and understanding when trying to determine if an ISFJ is flirting, as they may take a bit longer to open up compared to other personality types.