Their age is out of your scope. If you want to have some fun go for it you can nail that handsome guy down but remember he would just be with you for fun.Dont input feelings. If you want to settle down and are at your 30s. Stay far far away from all of them. None of them is a good fit. Hanging out with them all the time you may have illusions such as dreams and thoughts like a 20 year old.Being an immature 30+ year old could be a disaster for your future love life. Focus on your school work and get out of school ASAP.After univeristy, try to get a good job and buiild up your career then you can meet some quality professionals and life really kicks off from there. Good luck.