Unless there is a factual coincidence, this appears to be the second or perhaps the third thread that you have posted on the same subject. If that's the case, please see the advice suggested by various people on your other thread(s). That advice includes joining societies, taking up new activities, and contacting your college's welfare staff.
I hope that things improve for you. The aphorism that friendship is a vine is accurate. Vines have to be tended.
Another idea: if there are two or three people posting threads here about difficulty making friends at Oxford, why not message one of the other posters and suggest meeting for coffee at somewhere like the Arts Cafe in Bonn Square, or Brown's or the Columbian coffee place in the Covered Market?