why when I’m thinking about the person I’m in love...

That can happen when you’re deeply attached to someone, especially in a long-distance relationship. Your brain and body may be “recreating” him from memory because he feels emotionally important and physically missed.

When you love someone, your mind links them with safety, comfort, desire, routine, scent, touch, voice, and emotional regulation. So when you think about him intensely, your body can respond as if he’s nearby: warmth, tingles, calm, heaviness in the chest, goosebumps, a sense of being held, or even the feeling that his presence is in the room. It does not automatically mean anything is wrong. It can be a mix of longing, attachment, imagination, nervous-system memory, and love.

Long distance can make this stronger because there is a gap between emotional closeness and physical absence. Your body wants connection, so it reaches for the closest thing it has: memory, fantasy, anticipation, and emotional sensation.

It may also feel spiritual or intuitive to you, and that meaning is personal. Psychologically, though, it’s very understandable: love can become embodied. You’re not just “thinking” about him; your whole nervous system remembers him.

The only time I’d be concerned is if the feeling becomes frightening, intrusive, you feel unable to function, or you start hearing/seeing things others don’t in a way that distresses you. Then it would be worth talking to a mental health professional. Otherwise, this sounds like a very human response to missing someone you love.