There are many people who fall in love but they do not know about the concept of love in Islam. They do not know what Islam has to say about love. Islam allows only nikah. It does not allow befriending non-mehrams and going around with them. If you happen to fall in love with someone then the Islamic way is to do nikah with that person.
Allah talah says in quran
If ye fear that ye shall not be able to deal justly with the orphans, Marry women of your choice, Two or three or four; but if ye fear that ye shall not be able to deal justly (with them), then only one, or (a captive) that your right hands possess, that will be more suitable, to prevent you from doing injustice.
surah nisa verse no 3
If you like a girl/ woman, then send her a marriage proposal. Allah (swt) says in the Quran:
There is no blame on you if ye make an offer of betrothal or hold it in your hearts. Allah knows that ye cherish them in your hearts: But do not make a secret contract with them except in terms Honourable, nor resolve on the tie of marriage till the term prescribed is fulfilled. And know that Allah Knoweth what is in your hearts, and take heed of Him; and know that Allah is Oft-forgiving, Most Forbearing.
surah bakarah chaptorn o 2 verse no 235
Allah’s rasool Mohammad (SAWS) says that a momin looks for the following traits in his would-be wife:
A good character