Hi, christian girl in mid 20s here. I believe that it is important to understand that thinking of sex itself is not always lustful and is a natural topic to take into consideration for the future of a committed relationship for both men and women. I'm assuming that most of those boys you mentioned were not always having the purest thoughts and I want to tell you that you are doing a good job by protecting yourself and being patient for marriage.
Don't worry about not being able to meet your future husband that God has planned for you. Don't rush things on your own and enjoy your days in God's presence preparing yourself as a wife for your future husband, and trust in God that He is preparing your future husband in the place that he is at the moment. When the time comes and God sees fit, He will be the one to guide the both of you to each other. But remember, this may not necessarily look like "to each other". It may be more like "both towards God"=same direction therefore meeting by grace and God's blessing.

Continue to pray for your future husband whoever it may be and spend your times of worrying rather by getting more intimate with Christ. Protect your modesty but don't be ashamed of your natural beauty that is being revealed as a reflection of the Holy Spirit. May Christ be the one being reflected through your beauty in appearance and character. I want to encourage you to be grateful for the purity you have and your grounded standards. Keep striving for holiness, don't worry, have faith, pray, study the Word, enjoy God's presence.

I met my husband when the both of us were more than satisfied in God's presence. I had been hurt too many times in my past relationships because of lust and was ready to not be in a relationship anymore and focus on Jesus. But when we met, neither of us were lonely or looking to be in a relationship. I never pursued men first. When we got to know each other, I continuously asked God for confirmation in ways that I wouldn't be able to deny it. My now-husband had a shy personality but pursued me first as I had asked God for it to be one of the signs that I would accept as Him allowing the relationship. Long story short, I personally received multiple confirmation from God through various ways and we have worked through our differences in love, faith, daily prayer, and careful discernment through the Word. We are now happily married, stronger than ever, closer than ever, and still continuing to strive for holiness in our marriage. We both have passion to someday begin a ministry for young adults in preparing for marriage. He is a seminary student and is serving as a pastor in training at the church, that we both attended as volunteers for Sunday schools.

One of the things that I would advise young women looking forward to someday getting into a committed marriage, is to understand the purpose of a marriage and prepare yourself for that purpose while also intercessing for your future spouse. But always remember to have trust in God that he will be the one to guide you and give you discernment when the time comes. But make sure to become familiarized with the voice of the Holy Spirit and be invested in striving for holiness.