The best thing to do in this kind of scenario is to be calm, cool, and collected; don't let it get to you too much. Keep positive and stay firm with yourself, don't show defeat or become too apprehensive; don't hound him, just text here and there and let him know that you hope he is doing ok, that you are missing him, that you are a bit concerned, but don't over do it. It's important to keep in touch, despite the fact that he may be ignoring you, do not make any kinds of irrational threats towards him, and if he continues to ignore you, then let the situation settle as it may. Show a bit of concern, make an impression, try, and then let time do what it may. Showing initiative makes you the bigger and better person in some cases; letting things fester sometimes solves things, and sometimes makes others worse. Keep calm, don't jump to conclusions, and try to avoid making irrational assumptions. Your health and composure is the most important; you must remain steadfast, perhaps admit to wrongdoings, be attentive, and sometimes let things go. Time will always tell; don't let ignorance or insecurity overpower, or dominate you, or your feelings. Remain composed, remain true to yourself.