I don’t know what to do

First of all let me introduce myself. I just turned 21 last Sunday and I’m a female who is studying education at a non Christian school. I have a lot of great friends and family and a good home that I’m very thankful for. I go to different Christian groups and have been meeting new people there and at my church which has been great. But lately I have been feeling this pain in my heart that I’m single. Like I know I’m pretty young but for some reason since I’m a Christian my brain tells me that I have to be married by 25 or I will seem like I’m not desirable if I get married older. I’m someone who would rather marry younger than older and knowing that might not happen embarrasses me as a Christian. Lately I have had a desire to start a family someday and knowing that might not happen actually makes me feel like I’m grieving inside. A lot of people lately have been going into relationships and I haven’t. A lot of guys have liked me but they were never the right one because either they were non Christian,pretended to be Christian to have me. One guy I almost was with was a pretty great guy but he randomly decided to pursue his hard job instead of me even though he really liked me. I mean he lives far away and is really busy but it still hurt because he talked about a future. The guy is confusing because he stated he didn’t want a relationship with me but still texts me randomly and will visit my church to see me aggh. I have one guy that I could see myself with but I’m not expecting him to like me back or for it to work because all of the guys I’ve almost been with haven’t worked in some way. It actually seems like hopeless at this point and I hope I don’t sound vain but I don’t get why things don’t work out for me really romantically. I am a Christian,I’m nice and actually love to talk to people and my faith, and I think I’m pretty attractive so I always wonder why I don’t have a bf right now. Everyone tells me that it just may not be my time which makes me sad because I don’t understand why when I try to forget about this desire it keeps coming back. I ask God why he gave me such a big heart for it only to be in heart breaks so far. I could use advice how to cope with this because it’s hard. And I feel like since I’m a Christian I feel pressured to be married younger. I know that’s probably not true but that’s what it feels like when most Christians get married in their 20s. I just wish I could be at the point of my life where I have a loving husband and kids. I feel so lonely sometimes even though I have a lot of great people in my life. It’s just so hard and I feel bad I feel this way because I know God is good. But when I hear stories of women in their mid 30s not having the one despite trusting in God it makes me feel like God won’t bring me the one. :/ I honestly would be able to do well being single for that long it’s like impossible for me to imagine myself 10 years from now unmarried. Like I have God at least but it would be a pretty boring life for me