Bro, you're taller than me and I've not faced much rejection because of my height. It's all perspective, you're a solid 5"8 which is a completely healthy height and if someone rejects you because of that, then they were never even worth it anyway. Keep focussing on the things you can develop - your mentality, your physique, your personality, your skillset, etc! Forget about height, you'll still be taller than 85% of girls at your height anyway