All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
There are certain conditions for the validity of the marriage contract, the most important of which are the presence (and consent) of the guardian and the presence of two witnesses; you may read the other conditions in Fatwa 83629.
Therefore, if this marriage took place without a guardian and two witnesses, then it is a void marriage and it must be invalidated. We do not know how come this man says that in your case it is not necessary to have the presence of two witnesses? The fact that he is religious and trustworthy does not necessarily mean that he is a scholar and a Faqeeh (a scholar of Sharee’ah). Therefore, if you wish to renew the contract while fulfilling its Sharee’ah conditions, then you should try to convince the girl’s parents.
There is no doubt that marriage is a good thing that one should take the initiative to do. Also, it should not be delayed until a young man reaches a certain age on the pretext of him enjoying life or obtaining a job or saving a specific amount of money. Rather, it is more appropriate that the young man is helped in marriage by reducing its costs. ‘Aa’ishah narrated that the Prophet said: “The most blessed marriage is the one with the least expenditure.” [Ahmad]
Hence, if you have the financial ability to marry and you are able to earn your living, then you should marry in order to keep yourself chaste from temptations. Abu Hurayrah narrated that the Prophet said: “If a man whose religion and moral character are pleasing to you proposes to you, then let him marry. Otherwise there will be great mischief and corruption on earth.” [At-Tirmithi]
Finally, it should be noted that the reason for choosing a woman as a wife should be her religion because the Prophet said: “A woman is married for four things: for her wealth, her family lineage, her beauty and her religion. So choose the religious one, you will prosper.” [Al-Bukhari and Muslim]
As regards the difference of age and the like, then this is not religiously an obstacle as the Prophet married Khadeejah while she was much older than him.
Allaah Knows best.