How can I make a girl feel loved by my presence

I have fallen in love with many girls and I never know how I can make her feel loved. Most of the time when we're together we talk on different topics and we are shy to talk to each and most of recent relationship ends faster than I expected maybe in within a month. So I have realized that I was the one making mistake, so can you please make me understand how I can make the girl feel loved and feel free/ be flexible in her love language or express her romance to me.