Is loving someone enough to make them yours? No, of course not. Whenever you fall in love with someone, you think of them as the most important part of your life. You think about them every second of your day. You wanna be with them all the time, care about them, make them feel special and all that loving stuff. Everyone knows these things but all this is still not enough. You can't force a person into loving you back, it's their choice. Maybe they like you and maybe they don't but don't stop trying if you think that person is a need in your life. Try your heart out.
There's a difference between liking and loving someone. Love doesn't necessarily come with liking someone. Moreover, you can decide whom you like but don't decide whom you love, so let's leave it to fate. If you find yourself caring for someone and being restless if they aren't around, you can call that a feeling of love. Some say love is the easiest to explain and some say it's the most difficult but I think it's just unexplainable and self-explanatory at the same time. Those feelings, the fluttering of your heart, the skipped beats, the blush on your cheeks, the waves of happiness, and that remote connection all explain to you what love is. You can't know until you experience it.
If you are in love, you instantly want that person to reciprocate your feelings but you don't know if they feel the same. You'll make some moves, try to indulge in their life, be there for them and get to know them better. You'll try to figure out their feelings and maybe they'll start falling for you too but if you don't get a clue, you'll start thinking of ways and ideas and after a while, when you start falling for them more, you'll propose. If it's a yes, your efforts paid off and you are the happiest you can ever be. If it's a no, you tried hard, but it won't work out. Yes and no are simple to deal with, but it gets complicated when someone says they need time. Now it's you who has to decide whether to wait or move on.