Men have a tendency to keep a lot of emotions bottled up. But when a man really loves you, he is likely to make it known in a lot of subtle, and sometimes not so subtle ways
Though most men don't tend to share much of their emotions that freely, it is easy to see them. Also because not all them are that good at hiding them, and true love is very difficult to hide. Their lack of expression might also stem from the social construct and upbringing that does not allow them to openly express emotional vulnerability. No matter how hard they try to keep it in, if a man has really fallen for you, he is likely to make it known to you in some way or the other.
Though this might sound too much like a romantic movie, the way a man looks at you can reveal a lot of things. Do his eyes sought you out in crowds, and show a sudden relief when they find you? Check how much he smiles while looking at you. Certain muscles on the face tend to give away a heart's feelings - especially those of love and passion. Does he keep you in his gaze for most of the time he is with you?
When you meet his friends, does it feel like they already know you? When a man is really comfortable with you and is truly feeling things for you, he is likely to share his excitement and his pride (of meeting you) with his close friends - he'll probably be gushing about how amazing you are. So if you find that his friends already know things about your relationship, don't be surprised.
He knows the usual shades of lipstick that you prefer. He also notices your new hairdos and other tiny changes that others might easily miss. He observes the curve of your lips when you are thinking too hard, and all the things that you do when you are with him. He also notices which mood you're likely to be in and when they tend to shift. He also notices a lot of things that you probably don't even notice about yourself.
He is genuinely concerned about what you are feeling when you are with him. He is mindful of your happiness and sadness. Moreover, he does not always impose his will on you when you are feeling sad. He is not scared of your sadness or mood swings. This is a sign that he really feels for you, or else he'd not pay attention to things beyond what meets the eye.
A majority of the times, emotional openness and the ability to share what a man truly feels is a sign that he really feels comfortable with you and trusts you. Does your man share his dreams with you? When men are really in love, they don't hesitate to share their dreams and aspirations and commitments with their partners. Also, if his intimate plans also keep featuring you in them, he is likely to be in it for the long run.
Another sign that he has really fallen for you could be his investment of time and energy in being with you. He wants to spend a lot of time exploring new things with you. Does he always seem eager to go out on an adventure with you? It does not matter what you plan, if he is always up for having a great time with you, then this is one of the very clear signs that he's really fallen for you.
If a man is not really clear about his feelings, he will hesitate to introduce you to his family and friends. A very faint shadow of reluctance is likely to appear when someone asks about you. However, if he is happily telling his friends and colleagues that you're his partner and introducing you to them with the same zeal, then he really feels for you. You find no need to introduce yourself - since he is so proud to have you by his side that he does that for you naturally.